274991251 has 2 divisors, whose sum is σ = 274991252. Its totient is φ = 274991250.

The previous prime is 274991231. The next prime is 274991257. The reversal of 274991251 is 152199472.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-274991251 is a prime.

It is not a weakly prime, because it can be changed into another prime (274991257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137495625 + 137495626.

It is an arithmetic number, because the mean of its divisors is an integer number (137495626).

Almost surely, 2^274991251 is an apocalyptic number.

274991251 is a deficient number, since it is larger than the sum of its proper divisors (1).

274991251 is an equidigital number, since it uses as much as digits as its factorization.

274991251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 40.

The square root of 274991251 is about 16582.8601574035. The cubic root of 274991251 is about 650.2888270649.

The spelling of 274991251 in words is "two hundred seventy-four million, nine hundred ninety-one thousand, two hundred fifty-one".