124656421 has 2 divisors, whose sum is σ = 124656422. Its totient is φ = 124656420.

The previous prime is 124656419. The next prime is 124656431.

It is a happy number.

124656421 is nontrivially palindromic in base 10.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95765796 + 28890625 = 9786^2 + 5375^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 124656421 - 2¹ = 124656419 is a prime.

Together with 124656419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124656401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62328210 + 62328211.

It is an arithmetic number, because the mean of its divisors is an integer number (62328211).

Almost surely, 2^124656421 is an apocalyptic number.

It is an amenable number.

124656421 is a deficient number, since it is larger than the sum of its proper divisors (1).

124656421 is an equidigital number, since it uses as much as digits as its factorization.

124656421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 31.

The square root of 124656421 is about 11164.9639945680. The cubic root of 124656421 is about 499.5414743036.

The spelling of 124656421 in words is "one hundred twenty-four million, six hundred fifty-six thousand, four hundred twenty-one".