124131421 has 2 divisors, whose sum is σ = 124131422. Its totient is φ = 124131420.

The previous prime is 124131419. The next prime is 124131431.

124131421 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., 109956196 + 14175225 = 10486^2 + 3765^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 124131421 - 2¹ = 124131419 is a prime.

Together with 124131419, 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 (124131431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62065710 + 62065711.

It is an arithmetic number, because the mean of its divisors is an integer number (62065711).

Almost surely, 2^124131421 is an apocalyptic number.

It is an amenable number.

124131421 is a deficient number, since it is larger than the sum of its proper divisors (1).

124131421 is an equidigital number, since it uses as much as digits as its factorization.

124131421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 192, while the sum is 19.

The square root of 124131421 is about 11141.4281400546. The cubic root of 124131421 is about 498.8392018475.

The spelling of 124131421 in words is "one hundred twenty-four million, one hundred thirty-one thousand, four hundred twenty-one".