642505246 has 8 divisors (see below), whose sum is σ = 964086984. Its totient is φ = 321142920.

The previous prime is 642505229. The next prime is 642505247.

642505246 is nontrivially palindromic in base 10.

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

It is a super-2 number, since 2×642505246² = 825625982275041032, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642505247) 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, 47325 + ... + 59368.

It is an arithmetic number, because the mean of its divisors is an integer number (120510873).

Almost surely, 2^642505246 is an apocalyptic number.

642505246 is a deficient number, since it is larger than the sum of its proper divisors (321581738).

642505246 is a wasteful number, since it uses less digits than its factorization.

642505246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109706.

The product of its (nonzero) digits is 57600, while the sum is 34.

The square root of 642505246 is about 25347.6871923259. The cubic root of 642505246 is about 862.8968680060.

It can be divided in two parts, 64250 and 5246, that added together give a palindrome (69496).

The spelling of 642505246 in words is "six hundred forty-two million, five hundred five thousand, two hundred forty-six".