250861249 has 2 divisors, whose sum is σ = 250861250. Its totient is φ = 250861248.

The previous prime is 250861181. The next prime is 250861279. The reversal of 250861249 is 942168052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 249861249 + 1000000 = 15807^2 + 1000^2 .

It is a cyclic number.

It is not a de Polignac number, because 250861249 - 2²³ = 242472641 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (250861279) 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, 125430624 + 125430625.

It is an arithmetic number, because the mean of its divisors is an integer number (125430625).

Almost surely, 2^250861249 is an apocalyptic number.

It is an amenable number.

250861249 is a deficient number, since it is larger than the sum of its proper divisors (1).

250861249 is an equidigital number, since it uses as much as digits as its factorization.

250861249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 250861249 is about 15838.5999696943. The cubic root of 250861249 is about 630.6830996554.

It can be divided in two parts, 25086 and 1249, that added together give a triangular number (26335 = T₂₂₉).

The spelling of 250861249 in words is "two hundred fifty million, eight hundred sixty-one thousand, two hundred forty-nine".