125431515 has 48 divisors (see below), whose sum is σ = 239016960. Its totient is φ = 60344640.

The previous prime is 125431513. The next prime is 125431531. The reversal of 125431515 is 515134521.

It is not a de Polignac number, because 125431515 - 2¹ = 125431513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125431513) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 67894 + ... + 69716.

It is an arithmetic number, because the mean of its divisors is an integer number (4979520).

Almost surely, 2^125431515 is an apocalyptic number.

125431515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

125431515 is a deficient number, since it is larger than the sum of its proper divisors (113585445).

125431515 is a wasteful number, since it uses less digits than its factorization.

125431515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1984 (or 1981 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 125431515 is about 11199.6211989513. The cubic root of 125431515 is about 500.5746925372.

The spelling of 125431515 in words is "one hundred twenty-five million, four hundred thirty-one thousand, five hundred fifteen".