125231391 has 12 divisors (see below), whose sum is σ = 180986832. Its totient is φ = 83442816.

The previous prime is 125231383. The next prime is 125231419. The reversal of 125231391 is 193132521.

125231391 is a `hidden beast` number, since 1 + 2 + 523 + 139 + 1 = 666.

It is not a de Polignac number, because 125231391 - 2³ = 125231383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125231341) 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 11 ways as a sum of consecutive naturals, for example, 30630 + ... + 34476.

It is an arithmetic number, because the mean of its divisors is an integer number (15082236).

Almost surely, 2^125231391 is an apocalyptic number.

125231391 is a deficient number, since it is larger than the sum of its proper divisors (55755441).

125231391 is a wasteful number, since it uses less digits than its factorization.

125231391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7470 (or 7467 counting only the distinct ones).

The product of its digits is 1620, while the sum is 27.

The square root of 125231391 is about 11190.6832231102. The cubic root of 125231391 is about 500.3083311580.

The spelling of 125231391 in words is "one hundred twenty-five million, two hundred thirty-one thousand, three hundred ninety-one".