249918425 has 6 divisors (see below), whose sum is σ = 309898878. Its totient is φ = 199934720.

The previous prime is 249918421. The next prime is 249918443. The reversal of 249918425 is 524819942.

It can be written as a sum of positive squares in 3 ways, for example, as 1792921 + 248125504 = 1339^2 + 15752^2 .

It is not a de Polignac number, because 249918425 - 2² = 249918421 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (249918421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4998344 + ... + 4998393.

It is an arithmetic number, because the mean of its divisors is an integer number (51649813).

Almost surely, 2^249918425 is an apocalyptic number.

249918425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

249918425 is a deficient number, since it is larger than the sum of its proper divisors (59980453).

249918425 is an equidigital number, since it uses as much as digits as its factorization.

249918425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9996747 (or 9996742 counting only the distinct ones).

The product of its digits is 207360, while the sum is 44.

The square root of 249918425 is about 15808.8084623731. The cubic root of 249918425 is about 629.8919987871.

The spelling of 249918425 in words is "two hundred forty-nine million, nine hundred eighteen thousand, four hundred twenty-five".