249257449 has 4 divisors (see below), whose sum is σ = 284865664. Its totient is φ = 213649236.

The previous prime is 249257443. The next prime is 249257471. The reversal of 249257449 is 944752942.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 249257449 - 2²⁵ = 215703017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 249257399 and 249257408.

It is not an unprimeable number, because it can be changed into a prime (249257443) 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 in 3 ways as a sum of consecutive naturals, for example, 17804097 + ... + 17804110.

It is an arithmetic number, because the mean of its divisors is an integer number (71216416).

Almost surely, 2^249257449 is an apocalyptic number.

It is an amenable number.

249257449 is a deficient number, since it is larger than the sum of its proper divisors (35608215).

249257449 is an equidigital number, since it uses as much as digits as its factorization.

249257449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35608214.

The product of its digits is 725760, while the sum is 46.

The square root of 249257449 is about 15787.8893142814. The cubic root of 249257449 is about 629.3362026603.

The spelling of 249257449 in words is "two hundred forty-nine million, two hundred fifty-seven thousand, four hundred forty-nine".