125131506 has 8 divisors (see below), whose sum is σ = 250263024. Its totient is φ = 41710500.

The previous prime is 125131493. The next prime is 125131519. The reversal of 125131506 is 605131521.

It is an interprime number because it is at equal distance from previous prime (125131493) and next prime (125131519).

It is a sphenic number, since it is the product of 3 distinct primes.

125131506 is an admirable number.

It is an unprimeable number.

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, 10427620 + ... + 10427631.

It is an arithmetic number, because the mean of its divisors is an integer number (31282878).

Almost surely, 2^125131506 is an apocalyptic number.

125131506 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

125131506 is a wasteful number, since it uses less digits than its factorization.

125131506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20855256.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 125131506 is about 11186.2194686141. The cubic root of 125131506 is about 500.1752798801.

The spelling of 125131506 in words is "one hundred twenty-five million, one hundred thirty-one thousand, five hundred six".