642562276 has 12 divisors (see below), whose sum is σ = 1154875708. Its totient is φ = 312597792.

The previous prime is 642562223. The next prime is 642562331. The reversal of 642562276 is 672265246.

It can be written as a sum of positive squares in 2 ways, for example, as 385729600 + 256832676 = 19640^2 + 16026^2 .

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2170671 + ... + 2170966.

Almost surely, 2^642562276 is an apocalyptic number.

It is an amenable number.

642562276 is a deficient number, since it is larger than the sum of its proper divisors (512313432).

642562276 is a wasteful number, since it uses less digits than its factorization.

642562276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4341678 (or 4341676 counting only the distinct ones).

The product of its digits is 241920, while the sum is 40.

The square root of 642562276 is about 25348.8121220699. The cubic root of 642562276 is about 862.9223980453.

The spelling of 642562276 in words is "six hundred forty-two million, five hundred sixty-two thousand, two hundred seventy-six".