124837021 has 2 divisors, whose sum is σ = 124837022. Its totient is φ = 124837020.

The previous prime is 124837019. The next prime is 124837033. The reversal of 124837021 is 120738421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124768900 + 68121 = 11170^2 + 261^2 .

It is an emirp because it is prime and its reverse (120738421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 124837021 - 2¹ = 124837019 is a prime.

Together with 124837019, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124837051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62418510 + 62418511.

It is an arithmetic number, because the mean of its divisors is an integer number (62418511).

Almost surely, 2^124837021 is an apocalyptic number.

It is an amenable number.

124837021 is a deficient number, since it is larger than the sum of its proper divisors (1).

124837021 is an equidigital number, since it uses as much as digits as its factorization.

124837021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 124837021 is about 11173.0488676995. The cubic root of 124837021 is about 499.7826001550.

The spelling of 124837021 in words is "one hundred twenty-four million, eight hundred thirty-seven thousand, twenty-one".