642500652 has 48 divisors (see below), whose sum is σ = 1592680320. Its totient is φ = 200892672.

The previous prime is 642500647. The next prime is 642500657. The reversal of 642500652 is 256005246.

It is an interprime number because it is at equal distance from previous prime (642500647) and next prime (642500657).

It is not an unprimeable number, because it can be changed into a prime (642500657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57499 + ... + 67757.

It is an arithmetic number, because the mean of its divisors is an integer number (33180840).

Almost surely, 2^642500652 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 642500652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (796340160).

642500652 is an abundant number, since it is smaller than the sum of its proper divisors (950179668).

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

642500652 is a wasteful number, since it uses less digits than its factorization.

642500652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10590 (or 10588 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 642500652 is about 25347.5965724563. The cubic root of 642500652 is about 862.8948113911.

Adding to 642500652 its reverse (256005246), we get a palindrome (898505898).

The spelling of 642500652 in words is "six hundred forty-two million, five hundred thousand, six hundred fifty-two".