124603021 has 2 divisors, whose sum is σ = 124603022. Its totient is φ = 124603020.

The previous prime is 124603019. The next prime is 124603027. The reversal of 124603021 is 120306421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83064996 + 41538025 = 9114^2 + 6445^2 .

It is a cyclic number.

It is not a de Polignac number, because 124603021 - 2¹ = 124603019 is a prime.

Together with 124603019, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 124603021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124603027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62301510 + 62301511.

It is an arithmetic number, because the mean of its divisors is an integer number (62301511).

Almost surely, 2^124603021 is an apocalyptic number.

It is an amenable number.

124603021 is a deficient number, since it is larger than the sum of its proper divisors (1).

124603021 is an equidigital number, since it uses as much as digits as its factorization.

124603021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 124603021 is about 11162.5723289930. The cubic root of 124603021 is about 499.4701333477.

Adding to 124603021 its reverse (120306421), we get a palindrome (244909442).

The spelling of 124603021 in words is "one hundred twenty-four million, six hundred three thousand, twenty-one".