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642246 = 231137263
BaseRepresentation
bin10011100110011000110
31012121222220
42130303012
5131022441
621433210
75313303
oct2346306
91177886
10642246
113a9590
1226b806
13196437
1412a0aa
15ca466
hex9ccc6

642246 has 32 divisors (see below), whose sum is σ = 1444608. Its totient is φ = 188640.

The previous prime is 642241. The next prime is 642247.

642246 is nontrivially palindromic in base 10.

642246 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642241) by changing a digit.

642246 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2311 + ... + 2573.

It is an arithmetic number, because the mean of its divisors is an integer number (45144).

2642246 is an apocalyptic number.

642246 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 642246, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (722304).

642246 is an abundant number, since it is smaller than the sum of its proper divisors (802362).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

642246 is a wasteful number, since it uses less digits than its factorization.

642246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316.

The product of its digits is 2304, while the sum is 24.

The square root of 642246 is about 801.4025205850. The cubic root of 642246 is about 86.2780794943.

It can be divided in two parts, 642 and 246, that added together give a palindrome (888).

The spelling of 642246 in words is "six hundred forty-two thousand, two hundred forty-six".

Divisors: 1 2 3 6 11 22 33 37 66 74 111 222 263 407 526 789 814 1221 1578 2442 2893 5786 8679 9731 17358 19462 29193 58386 107041 214082 321123 642246