124504021 has 4 divisors (see below), whose sum is σ = 124953772. Its totient is φ = 124054272.

The previous prime is 124504019. The next prime is 124504027. The reversal of 124504021 is 120405421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 78127921 + 46376100 = 8839^2 + 6810^2 .

It is a cyclic number.

It is not a de Polignac number, because 124504021 - 2¹ = 124504019 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 124504021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124504027) 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, 224460 + ... + 225013.

It is an arithmetic number, because the mean of its divisors is an integer number (31238443).

Almost surely, 2^124504021 is an apocalyptic number.

It is an amenable number.

124504021 is a deficient number, since it is larger than the sum of its proper divisors (449751).

124504021 is an equidigital number, since it uses as much as digits as its factorization.

124504021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449750.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 124504021 is about 11158.1369860743. The cubic root of 124504021 is about 499.3378180840.

Adding to 124504021 its reverse (120405421), we get a palindrome (244909442).

It can be divided in two parts, 12450 and 4021, that added together give a triangular number (16471 = T₁₈₁).

The spelling of 124504021 in words is "one hundred twenty-four million, five hundred four thousand, twenty-one".