78087525 has 12 divisors (see below), whose sum is σ = 129104832. Its totient is φ = 41646640.

The previous prime is 78087523. The next prime is 78087533. The reversal of 78087525 is 52578087.

It is a happy number.

It is not a de Polignac number, because 78087525 - 2¹ = 78087523 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78087521) 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 11 ways as a sum of consecutive naturals, for example, 520509 + ... + 520658.

It is an arithmetic number, because the mean of its divisors is an integer number (10758736).

Almost surely, 2^78087525 is an apocalyptic number.

78087525 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

78087525 is a deficient number, since it is larger than the sum of its proper divisors (51017307).

78087525 is a wasteful number, since it uses less digits than its factorization.

78087525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041180 (or 1041175 counting only the distinct ones).

The product of its (nonzero) digits is 156800, while the sum is 42.

The square root of 78087525 is about 8836.7146044217. The cubic root of 78087525 is about 427.4256222985.

The spelling of 78087525 in words is "seventy-eight million, eighty-seven thousand, five hundred twenty-five".