642276525 has 96 divisors (see below), whose sum is σ = 1215243648. Its totient is φ = 296524800.

The previous prime is 642276517. The next prime is 642276563. The reversal of 642276525 is 525672246.

It is not a de Polignac number, because 642276525 - 2³ = 642276517 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1617627 + ... + 1618023.

It is an arithmetic number, because the mean of its divisors is an integer number (12658788).

Almost surely, 2^642276525 is an apocalyptic number.

It is an amenable number.

642276525 is a deficient number, since it is larger than the sum of its proper divisors (572967123).

642276525 is a wasteful number, since it uses less digits than its factorization.

642276525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511 (or 506 counting only the distinct ones).

The product of its digits is 201600, while the sum is 39.

The square root of 642276525 is about 25343.1751167844. The cubic root of 642276525 is about 862.7944636238.

The spelling of 642276525 in words is "six hundred forty-two million, two hundred seventy-six thousand, five hundred twenty-five".