642586532 has 12 divisors (see below), whose sum is σ = 1285173120. Its totient is φ = 275394216.

The previous prime is 642586531. The next prime is 642586583. The reversal of 642586532 is 235685246.

It is a happy number.

642586532 is an admirable number.

It is a super-2 number, since 2×642586532² = 825834902215574048, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 642586532.

It is not an unprimeable number, because it can be changed into a prime (642586531) 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, 11474732 + ... + 11474787.

It is an arithmetic number, because the mean of its divisors is an integer number (107097760).

Almost surely, 2^642586532 is an apocalyptic number.

It is an amenable number.

642586532 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

642586532 is a wasteful number, since it uses less digits than its factorization.

642586532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22949530 (or 22949528 counting only the distinct ones).

The product of its digits is 345600, while the sum is 41.

The square root of 642586532 is about 25349.2905620650. The cubic root of 642586532 is about 862.9332560239.

The spelling of 642586532 in words is "six hundred forty-two million, five hundred eighty-six thousand, five hundred thirty-two".