124627721 has 2 divisors, whose sum is σ = 124627722. Its totient is φ = 124627720.

The previous prime is 124627673. The next prime is 124627733. The reversal of 124627721 is 127726421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121242121 + 3385600 = 11011^2 + 1840^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-124627721 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (124627121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62313860 + 62313861.

It is an arithmetic number, because the mean of its divisors is an integer number (62313861).

Almost surely, 2^124627721 is an apocalyptic number.

It is an amenable number.

124627721 is a deficient number, since it is larger than the sum of its proper divisors (1).

124627721 is an equidigital number, since it uses as much as digits as its factorization.

124627721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9408, while the sum is 32.

The square root of 124627721 is about 11163.6786499791. The cubic root of 124627721 is about 499.5031344127.

The spelling of 124627721 in words is "one hundred twenty-four million, six hundred twenty-seven thousand, seven hundred twenty-one".