124873921 has 4 divisors (see below), whose sum is σ = 128902144. Its totient is φ = 120845700.

The previous prime is 124873907. The next prime is 124873933. The reversal of 124873921 is 129378421.

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 124873921 - 2²⁵ = 91319489 is a prime.

It is a super-2 number, since 2×124873921² = 31186992291828482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (124873951) 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, 2014065 + ... + 2014126.

It is an arithmetic number, because the mean of its divisors is an integer number (32225536).

Almost surely, 2^124873921 is an apocalyptic number.

It is an amenable number.

124873921 is a deficient number, since it is larger than the sum of its proper divisors (4028223).

124873921 is an equidigital number, since it uses as much as digits as its factorization.

124873921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4028222.

The product of its digits is 24192, while the sum is 37.

The square root of 124873921 is about 11174.7000407170. The cubic root of 124873921 is about 499.8318381162.

The spelling of 124873921 in words is "one hundred twenty-four million, eight hundred seventy-three thousand, nine hundred twenty-one".