642576 has 40 divisors (see below), whose sum is σ = 1812384. Its totient is φ = 194560.

The previous prime is 642563. The next prime is 642581. The reversal of 642576 is 675246.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 642576.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81 + ... + 1136.

2⁶⁴²⁵⁷⁶ is an apocalyptic number.

642576 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 642576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (906192).

642576 is an abundant number, since it is smaller than the sum of its proper divisors (1169808).

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

642576 is a wasteful number, since it uses less digits than its factorization.

642576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1239 (or 1233 counting only the distinct ones).

The product of its digits is 10080, while the sum is 30.

The square root of 642576 is about 801.6083831897. The cubic root of 642576 is about 86.2928541503.

The spelling of 642576 in words is "six hundred forty-two thousand, five hundred seventy-six".