525138756 has 12 divisors (see below), whose sum is σ = 1225323792. Its totient is φ = 175046248.

The previous prime is 525138751. The next prime is 525138769. The reversal of 525138756 is 657831525.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (525138751) 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 3 ways as a sum of consecutive naturals, for example, 21880770 + ... + 21880793.

It is an arithmetic number, because the mean of its divisors is an integer number (102110316).

Almost surely, 2^525138756 is an apocalyptic number.

It is an amenable number.

525138756 is an abundant number, since it is smaller than the sum of its proper divisors (700185036).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

525138756 is a wasteful number, since it uses less digits than its factorization.

525138756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43761570 (or 43761568 counting only the distinct ones).

The product of its digits is 252000, while the sum is 42.

The square root of 525138756 is about 22915.9061788968. The cubic root of 525138756 is about 806.7853875155.

The spelling of 525138756 in words is "five hundred twenty-five million, one hundred thirty-eight thousand, seven hundred fifty-six".