124444721 has 2 divisors, whose sum is σ = 124444722. Its totient is φ = 124444720.

The previous prime is 124444711. The next prime is 124444739. The reversal of 124444721 is 127444421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123654400 + 790321 = 11120^2 + 889^2 .

It is a cyclic number.

It is not a de Polignac number, because 124444721 - 2¹⁸ = 124182577 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (124444711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62222360 + 62222361.

It is an arithmetic number, because the mean of its divisors is an integer number (62222361).

Almost surely, 2^124444721 is an apocalyptic number.

It is an amenable number.

124444721 is a deficient number, since it is larger than the sum of its proper divisors (1).

124444721 is an equidigital number, since it uses as much as digits as its factorization.

124444721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7168, while the sum is 29.

The square root of 124444721 is about 11155.4794159642. The cubic root of 124444721 is about 499.2585289850.

The spelling of 124444721 in words is "one hundred twenty-four million, four hundred forty-four thousand, seven hundred twenty-one".