124401021 has 16 divisors (see below), whose sum is σ = 172518720. Its totient is φ = 79672320.

The previous prime is 124401007. The next prime is 124401023. The reversal of 124401021 is 120104421.

It is not a de Polignac number, because 124401021 - 2⁵ = 124400989 is a prime.

It is a super-2 number, since 2×124401021² = 30951228051684882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124401023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36 + ... + 15773.

It is an arithmetic number, because the mean of its divisors is an integer number (10782420).

Almost surely, 2^124401021 is an apocalyptic number.

It is an amenable number.

124401021 is a deficient number, since it is larger than the sum of its proper divisors (48117699).

124401021 is a wasteful number, since it uses less digits than its factorization.

124401021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15916.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 124401021 is about 11153.5205652744. The cubic root of 124401021 is about 499.2000822791.

Adding to 124401021 its reverse (120104421), we get a palindrome (244505442).

The spelling of 124401021 in words is "one hundred twenty-four million, four hundred one thousand, twenty-one".