124261639 has 2 divisors, whose sum is σ = 124261640. Its totient is φ = 124261638.

The previous prime is 124261637. The next prime is 124261649. The reversal of 124261639 is 936162421.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 124261639 - 2¹ = 124261637 is a prime.

Together with 124261637, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124261633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62130819 + 62130820.

It is an arithmetic number, because the mean of its divisors is an integer number (62130820).

Almost surely, 2^124261639 is an apocalyptic number.

124261639 is a deficient number, since it is larger than the sum of its proper divisors (1).

124261639 is an equidigital number, since it uses as much as digits as its factorization.

124261639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 34.

The square root of 124261639 is about 11147.2704730799. The cubic root of 124261639 is about 499.0135738734.

The spelling of 124261639 in words is "one hundred twenty-four million, two hundred sixty-one thousand, six hundred thirty-nine".