249284457 has 12 divisors (see below), whose sum is σ = 360980724. Its totient is φ = 165772800.

The previous prime is 249284449. The next prime is 249284489. The reversal of 249284457 is 754482942.

It can be written as a sum of positive squares in 2 ways, for example, as 213715161 + 35569296 = 14619^2 + 5964^2 .

It is not a de Polignac number, because 249284457 - 2³ = 249284449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (249284437) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30928 + ... + 38145.

It is an arithmetic number, because the mean of its divisors is an integer number (30081727).

Almost surely, 2^249284457 is an apocalyptic number.

It is an amenable number.

249284457 is a deficient number, since it is larger than the sum of its proper divisors (111696267).

249284457 is a wasteful number, since it uses less digits than its factorization.

249284457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69480 (or 69477 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The square root of 249284457 is about 15788.7446302738. The cubic root of 249284457 is about 629.3589321693.

The spelling of 249284457 in words is "two hundred forty-nine million, two hundred eighty-four thousand, four hundred fifty-seven".