124343021 has 4 divisors (see below), whose sum is σ = 135646944. Its totient is φ = 113039100.

The previous prime is 124343003. The next prime is 124343027. The reversal of 124343021 is 120343421.

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 124343021 - 2⁶ = 124342957 is a prime.

It is a super-2 number, since 2×124343021² = 30922373742812882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 124342984 and 124343002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124343027) 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, 5651945 + ... + 5651966.

It is an arithmetic number, because the mean of its divisors is an integer number (33911736).

Almost surely, 2^124343021 is an apocalyptic number.

124343021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

124343021 is a deficient number, since it is larger than the sum of its proper divisors (11303923).

124343021 is a wasteful number, since it uses less digits than its factorization.

124343021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11303922.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 124343021 is about 11150.9201862447. The cubic root of 124343021 is about 499.1224888493.

Adding to 124343021 its reverse (120343421), we get a palindrome (244686442).

The spelling of 124343021 in words is "one hundred twenty-four million, three hundred forty-three thousand, twenty-one".