124487729 has 2 divisors, whose sum is σ = 124487730. Its totient is φ = 124487728.

The previous prime is 124487683. The next prime is 124487731. The reversal of 124487729 is 927784421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124099600 + 388129 = 11140^2 + 623^2 .

It is a cyclic number.

It is not a de Polignac number, because 124487729 - 2²⁰ = 123439153 is a prime.

Together with 124487731, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 124487729.

It is not a weakly prime, because it can be changed into another prime (124487929) 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, 62243864 + 62243865.

It is an arithmetic number, because the mean of its divisors is an integer number (62243865).

Almost surely, 2^124487729 is an apocalyptic number.

It is an amenable number.

124487729 is a deficient number, since it is larger than the sum of its proper divisors (1).

124487729 is an equidigital number, since it uses as much as digits as its factorization.

124487729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 225792, while the sum is 44.

The square root of 124487729 is about 11157.4069120024. The cubic root of 124487729 is about 499.3160368153.

The spelling of 124487729 in words is "one hundred twenty-four million, four hundred eighty-seven thousand, seven hundred twenty-nine".