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1331642 = 21351217
BaseRepresentation
bin101000101000110111010
32111122200002
411011012322
5320103032
644313002
714214224
oct5050672
92448602
101331642
1182a534
12542762
13378170
14269414
151b4862
hex1451ba

1331642 has 8 divisors (see below), whose sum is σ = 2151156. Its totient is φ = 614592.

The previous prime is 1331641. The next prime is 1331647. The reversal of 1331642 is 2461331.

It can be written as a sum of positive squares in 2 ways, for example, as 1229881 + 101761 = 1109^2 + 319^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25583 + ... + 25634.

21331642 is an apocalyptic number.

1331642 is a deficient number, since it is larger than the sum of its proper divisors (819514).

1331642 is a wasteful number, since it uses less digits than its factorization.

1331642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51232.

The product of its digits is 432, while the sum is 20.

The square root of 1331642 is about 1153.9679371629. The cubic root of 1331642 is about 110.0176831076.

Adding to 1331642 its reverse (2461331), we get a palindrome (3792973).

The spelling of 1331642 in words is "one million, three hundred thirty-one thousand, six hundred forty-two".

Divisors: 1 2 13 26 51217 102434 665821 1331642