251126849 has 2 divisors, whose sum is σ = 251126850. Its totient is φ = 251126848.

The previous prime is 251126831. The next prime is 251126861. The reversal of 251126849 is 948621152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 245486224 + 5640625 = 15668^2 + 2375^2 .

It is a cyclic number.

It is not a de Polignac number, because 251126849 - 2²⁰ = 250078273 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (251126809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125563424 + 125563425.

It is an arithmetic number, because the mean of its divisors is an integer number (125563425).

Almost surely, 2^251126849 is an apocalyptic number.

It is an amenable number.

251126849 is a deficient number, since it is larger than the sum of its proper divisors (1).

251126849 is an equidigital number, since it uses as much as digits as its factorization.

251126849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 38.

The square root of 251126849 is about 15846.9823310307. The cubic root of 251126849 is about 630.9056002737.

The spelling of 251126849 in words is "two hundred fifty-one million, one hundred twenty-six thousand, eight hundred forty-nine".