124921439 has 2 divisors, whose sum is σ = 124921440. Its totient is φ = 124921438.

The previous prime is 124921427. The next prime is 124921453. The reversal of 124921439 is 934129421.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-124921439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 124921399 and 124921408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124921639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62460719 + 62460720.

It is an arithmetic number, because the mean of its divisors is an integer number (62460720).

Almost surely, 2^124921439 is an apocalyptic number.

124921439 is a deficient number, since it is larger than the sum of its proper divisors (1).

124921439 is an equidigital number, since it uses as much as digits as its factorization.

124921439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 35.

The square root of 124921439 is about 11176.8259805725. The cubic root of 124921439 is about 499.8952300480.

It can be divided in two parts, 12492 and 1439, that added together give a palindrome (13931).

The spelling of 124921439 in words is "one hundred twenty-four million, nine hundred twenty-one thousand, four hundred thirty-nine".