642625262 has 16 divisors (see below), whose sum is σ = 1023600240. Its totient is φ = 301534848.

The previous prime is 642625261. The next prime is 642625271. The reversal of 642625262 is 262526246.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642625261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15437 + ... + 39032.

It is an arithmetic number, because the mean of its divisors is an integer number (63975015).

Almost surely, 2^642625262 is an apocalyptic number.

642625262 is a deficient number, since it is larger than the sum of its proper divisors (380974978).

642625262 is a wasteful number, since it uses less digits than its factorization.

642625262 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54835.

The product of its digits is 69120, while the sum is 35.

The square root of 642625262 is about 25350.0544772590. The cubic root of 642625262 is about 862.9505925910.

The spelling of 642625262 in words is "six hundred forty-two million, six hundred twenty-five thousand, two hundred sixty-two".