249125431 has 2 divisors, whose sum is σ = 249125432. Its totient is φ = 249125430.

The previous prime is 249125299. The next prime is 249125441. The reversal of 249125431 is 134521942.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 249125431 - 2²³ = 240736823 is a prime.

It is a super-2 number, since 2×249125431² = 124126960741871522, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 249125393 and 249125402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249125441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124562715 + 124562716.

It is an arithmetic number, because the mean of its divisors is an integer number (124562716).

Almost surely, 2^249125431 is an apocalyptic number.

249125431 is a deficient number, since it is larger than the sum of its proper divisors (1).

249125431 is an equidigital number, since it uses as much as digits as its factorization.

249125431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 31.

The square root of 249125431 is about 15783.7077709897. The cubic root of 249125431 is about 629.2250747485.

The spelling of 249125431 in words is "two hundred forty-nine million, one hundred twenty-five thousand, four hundred thirty-one".