124986917 has 4 divisors (see below), whose sum is σ = 136349376. Its totient is φ = 113624460.

The previous prime is 124986893. The next prime is 124986919. The reversal of 124986917 is 719689421.

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.

It is a cyclic number.

It is not a de Polignac number, because 124986917 - 2¹⁴ = 124970533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124986919) 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, 5681213 + ... + 5681234.

It is an arithmetic number, because the mean of its divisors is an integer number (34087344).

Almost surely, 2^124986917 is an apocalyptic number.

It is an amenable number.

124986917 is a deficient number, since it is larger than the sum of its proper divisors (11362459).

124986917 is a wasteful number, since it uses less digits than its factorization.

124986917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11362458.

The product of its digits is 217728, while the sum is 47.

The square root of 124986917 is about 11179.7547826417. The cubic root of 124986917 is about 499.9825553914.

The spelling of 124986917 in words is "one hundred twenty-four million, nine hundred eighty-six thousand, nine hundred seventeen".