249904241 has 2 divisors, whose sum is σ = 249904242. Its totient is φ = 249904240.

The previous prime is 249904229. The next prime is 249904243. The reversal of 249904241 is 142409942.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 249513616 + 390625 = 15796^2 + 625^2 .

It is a cyclic number.

It is not a de Polignac number, because 249904241 - 2²⁶ = 182795377 is a prime.

Together with 249904243, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (249904243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124952120 + 124952121.

It is an arithmetic number, because the mean of its divisors is an integer number (124952121).

Almost surely, 2^249904241 is an apocalyptic number.

It is an amenable number.

249904241 is a deficient number, since it is larger than the sum of its proper divisors (1).

249904241 is an equidigital number, since it uses as much as digits as its factorization.

249904241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 249904241 is about 15808.3598453477. The cubic root of 249904241 is about 629.8800821559.

The spelling of 249904241 in words is "two hundred forty-nine million, nine hundred four thousand, two hundred forty-one".