124231391 has 2 divisors, whose sum is σ = 124231392. Its totient is φ = 124231390.

The previous prime is 124231379. The next prime is 124231411. The reversal of 124231391 is 193132421.

It is a weak prime.

It is an emirp because it is prime and its reverse (193132421) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-124231391 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 124231391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124231301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62115695 + 62115696.

It is an arithmetic number, because the mean of its divisors is an integer number (62115696).

Almost surely, 2^124231391 is an apocalyptic number.

124231391 is a deficient number, since it is larger than the sum of its proper divisors (1).

124231391 is an equidigital number, since it uses as much as digits as its factorization.

124231391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 26.

The square root of 124231391 is about 11145.9136458166. The cubic root of 124231391 is about 498.9730803159.

The spelling of 124231391 in words is "one hundred twenty-four million, two hundred thirty-one thousand, three hundred ninety-one".