124220421 has 24 divisors (see below), whose sum is σ = 197733536. Its totient is φ = 74662560.

The previous prime is 124220419. The next prime is 124220443. The reversal of 124220421 is 124022421.

124220421 is a `hidden beast` number, since 1 + 24 + 220 + 421 = 666.

It is not a de Polignac number, because 124220421 - 2¹ = 124220419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 124220394 and 124220403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124220491) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7315 + ... + 17376.

Almost surely, 2^124220421 is an apocalyptic number.

It is an amenable number.

124220421 is a deficient number, since it is larger than the sum of its proper divisors (73513115).

124220421 is a wasteful number, since it uses less digits than its factorization.

124220421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24753 (or 24750 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 124220421 is about 11145.4215263488. The cubic root of 124220421 is about 498.9583929496.

Adding to 124220421 its reverse (124022421), we get a palindrome (248242842).

The spelling of 124220421 in words is "one hundred twenty-four million, two hundred twenty thousand, four hundred twenty-one".