124291921 has 8 divisors (see below), whose sum is σ = 134656704. Its totient is φ = 114042000.

The previous prime is 124291907. The next prime is 124291933. The reversal of 124291921 is 129192421.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 124291921 - 2⁵ = 124291889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (124291721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26455 + ... + 30796.

It is an arithmetic number, because the mean of its divisors is an integer number (16832088).

Almost surely, 2^124291921 is an apocalyptic number.

It is an amenable number.

124291921 is a deficient number, since it is larger than the sum of its proper divisors (10364783).

124291921 is a wasteful number, since it uses less digits than its factorization.

124291921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57431.

The product of its digits is 2592, while the sum is 31.

The square root of 124291921 is about 11148.6286600640. The cubic root of 124291921 is about 499.0541063655.

The spelling of 124291921 in words is "one hundred twenty-four million, two hundred ninety-one thousand, nine hundred twenty-one".