125502531 has 24 divisors (see below), whose sum is σ = 210212352. Its totient is φ = 65194800.

The previous prime is 125502527. The next prime is 125502541. The reversal of 125502531 is 135205521.

It is a happy number.

It is not a de Polignac number, because 125502531 - 2² = 125502527 is a prime.

It is a super-2 number, since 2×125502531² = 31501770574811922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (125502541) 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 23 ways as a sum of consecutive naturals, for example, 22155 + ... + 27236.

It is an arithmetic number, because the mean of its divisors is an integer number (8758848).

Almost surely, 2^125502531 is an apocalyptic number.

125502531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

125502531 is a deficient number, since it is larger than the sum of its proper divisors (84709821).

125502531 is a wasteful number, since it uses less digits than its factorization.

125502531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49423 (or 49412 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 125502531 is about 11202.7912146929. The cubic root of 125502531 is about 500.6691454227.

The spelling of 125502531 in words is "one hundred twenty-five million, five hundred two thousand, five hundred thirty-one".