864240525 has 108 divisors (see below), whose sum is σ = 1660745268. Its totient is φ = 429411840.

The previous prime is 864240523. The next prime is 864240541. The reversal of 864240525 is 525042468.

It is a happy number.

864240525 is a `hidden beast` number, since 8 + 642 + 4 + 0 + 5 + 2 + 5 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 233289 + 864007236 = 483^2 + 29394^2 .

It is not a de Polignac number, because 864240525 - 2¹ = 864240523 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 864240525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864240523) by changing a digit.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 6308257 + ... + 6308393.

It is an arithmetic number, because the mean of its divisors is an integer number (15377271).

Almost surely, 2^864240525 is an apocalyptic number.

It is an amenable number.

864240525 is a deficient number, since it is larger than the sum of its proper divisors (796504743).

864240525 is a wasteful number, since it uses less digits than its factorization.

864240525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252 (or 221 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

The square root of 864240525 is about 29397.9680420263. The cubic root of 864240525 is about 952.5290048414.

The spelling of 864240525 in words is "eight hundred sixty-four million, two hundred forty thousand, five hundred twenty-five".