124971513 has 4 divisors (see below), whose sum is σ = 166628688. Its totient is φ = 83314340.

The previous prime is 124971503. The next prime is 124971521. The reversal of 124971513 is 315179421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 315179421 = 3 ⋅105059807.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-124971513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (124971503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20828583 + ... + 20828588.

It is an arithmetic number, because the mean of its divisors is an integer number (41657172).

Almost surely, 2^124971513 is an apocalyptic number.

It is an amenable number.

124971513 is a deficient number, since it is larger than the sum of its proper divisors (41657175).

124971513 is an equidigital number, since it uses as much as digits as its factorization.

124971513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41657174.

The product of its digits is 7560, while the sum is 33.

The square root of 124971513 is about 11179.0658375376. The cubic root of 124971513 is about 499.9620144476.

The spelling of 124971513 in words is "one hundred twenty-four million, nine hundred seventy-one thousand, five hundred thirteen".