249798025 has 27 divisors (see below), whose sum is σ = 323768991. Its totient is φ = 191177280.

The previous prime is 249798011. The next prime is 249798037. The reversal of 249798025 is 520897942.

The square root of 249798025 is 15805.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 13 ways, for example, as 103774969 + 146023056 = 10187^2 + 12084^2 .

It is not a de Polignac number, because 249798025 - 2¹³ = 249789833 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2291671 + ... + 2291779.

Almost surely, 2^249798025 is an apocalyptic number.

249798025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

249798025 is the 15805-th square number.

249798025 is the 7903-rd centered octagonal number.

It is an amenable number.

249798025 is a deficient number, since it is larger than the sum of its proper divisors (73970966).

249798025 is an equidigital number, since it uses as much as digits as its factorization.

249798025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286 (or 143 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 46.

The cubic root of 249798025 is about 629.7908308712.

The spelling of 249798025 in words is "two hundred forty-nine million, seven hundred ninety-eight thousand, twenty-five".