124324721 has 2 divisors, whose sum is σ = 124324722. Its totient is φ = 124324720.

The previous prime is 124324709. The next prime is 124324799. The reversal of 124324721 is 127423421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107350321 + 16974400 = 10361^2 + 4120^2 .

It is a cyclic number.

It is not a de Polignac number, because 124324721 - 2¹⁴ = 124308337 is a prime.

It is not a weakly prime, because it can be changed into another prime (124323721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62162360 + 62162361.

It is an arithmetic number, because the mean of its divisors is an integer number (62162361).

Almost surely, 2^124324721 is an apocalyptic number.

It is an amenable number.

124324721 is a deficient number, since it is larger than the sum of its proper divisors (1).

124324721 is an equidigital number, since it uses as much as digits as its factorization.

124324721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2688, while the sum is 26.

The square root of 124324721 is about 11150.0995959677. The cubic root of 124324721 is about 499.0980017769.

The spelling of 124324721 in words is "one hundred twenty-four million, three hundred twenty-four thousand, seven hundred twenty-one".