642501125 has 32 divisors (see below), whose sum is σ = 925416960. Its totient is φ = 436233600.

The previous prime is 642501107. The next prime is 642501127. The reversal of 642501125 is 521105246.

It is not a de Polignac number, because 642501125 - 2⁸ = 642500869 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 642501094 and 642501103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642501127) 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 31 ways as a sum of consecutive naturals, for example, 86561 + ... + 93689.

It is an arithmetic number, because the mean of its divisors is an integer number (28919280).

Almost surely, 2^642501125 is an apocalyptic number.

It is an amenable number.

642501125 is a deficient number, since it is larger than the sum of its proper divisors (282915835).

642501125 is a wasteful number, since it uses less digits than its factorization.

642501125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7254 (or 7244 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 642501125 is about 25347.6059027278. The cubic root of 642501125 is about 862.8950231414.

The spelling of 642501125 in words is "six hundred forty-two million, five hundred one thousand, one hundred twenty-five".