249412157 has 2 divisors, whose sum is σ = 249412158. Its totient is φ = 249412156.

The previous prime is 249412139. The next prime is 249412187. The reversal of 249412157 is 751214942.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 181333156 + 68079001 = 13466^2 + 8251^2 .

It is a cyclic number.

It is not a de Polignac number, because 249412157 - 2¹⁰ = 249411133 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249412187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124706078 + 124706079.

It is an arithmetic number, because the mean of its divisors is an integer number (124706079).

Almost surely, 2^249412157 is an apocalyptic number.

It is an amenable number.

249412157 is a deficient number, since it is larger than the sum of its proper divisors (1).

249412157 is an equidigital number, since it uses as much as digits as its factorization.

249412157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 35.

The square root of 249412157 is about 15792.7881325623. The cubic root of 249412157 is about 629.4663802590.

The spelling of 249412157 in words is "two hundred forty-nine million, four hundred twelve thousand, one hundred fifty-seven".