124124421 has 4 divisors (see below), whose sum is σ = 165499232. Its totient is φ = 82749612.

The previous prime is 124124417. The next prime is 124124423. The reversal of 124124421 is 124421421.

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 not a de Polignac number, because 124124421 - 2² = 124124417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124124423) 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, 20687401 + ... + 20687406.

It is an arithmetic number, because the mean of its divisors is an integer number (41374808).

Almost surely, 2^124124421 is an apocalyptic number.

It is an amenable number.

124124421 is a deficient number, since it is larger than the sum of its proper divisors (41374811).

124124421 is an equidigital number, since it uses as much as digits as its factorization.

124124421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41374810.

The product of its digits is 512, while the sum is 21.

The square root of 124124421 is about 11141.1139927747. The cubic root of 124124421 is about 498.8298248500.

Adding to 124124421 its reverse (124421421), we get a palindrome (248545842).

The spelling of 124124421 in words is "one hundred twenty-four million, one hundred twenty-four thousand, four hundred twenty-one".