78130525 has 12 divisors (see below), whose sum is σ = 105689664. Its totient is φ = 56822000.

The previous prime is 78130523. The next prime is 78130529. The reversal of 78130525 is 52503187.

It is not a de Polignac number, because 78130525 - 2¹ = 78130523 is a prime.

It is a super-2 number, since 2×78130525² = 12208757873551250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78130523) 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, 141781 + ... + 142330.

It is an arithmetic number, because the mean of its divisors is an integer number (8807472).

Almost surely, 2^78130525 is an apocalyptic number.

It is an amenable number.

78130525 is a deficient number, since it is larger than the sum of its proper divisors (27559139).

78130525 is a wasteful number, since it uses less digits than its factorization.

78130525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284132 (or 284127 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 78130525 is about 8839.1473005036. The cubic root of 78130525 is about 427.5040638899.

The spelling of 78130525 in words is "seventy-eight million, one hundred thirty thousand, five hundred twenty-five".