64140925 has 12 divisors (see below), whose sum is σ = 79676820. Its totient is φ = 51221120.

The previous prime is 64140917. The next prime is 64140929. The reversal of 64140925 is 52904146.

It can be written as a sum of positive squares in 6 ways, for example, as 13816089 + 50324836 = 3717^2 + 7094^2 .

It is not a de Polignac number, because 64140925 - 2³ = 64140917 is a prime.

It is a super-2 number, since 2×64140925² = 8228116519711250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64140929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14361 + ... + 18289.

It is an arithmetic number, because the mean of its divisors is an integer number (6639735).

Almost surely, 2^64140925 is an apocalyptic number.

It is an amenable number.

64140925 is a deficient number, since it is larger than the sum of its proper divisors (15535895).

64140925 is a wasteful number, since it uses less digits than its factorization.

64140925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4592 (or 4587 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 64140925 is about 8008.8029692333. The cubic root of 64140925 is about 400.2933785200.

The spelling of 64140925 in words is "sixty-four million, one hundred forty thousand, nine hundred twenty-five".