249686425 has 6 divisors (see below), whose sum is σ = 309611198. Its totient is φ = 199749120.

The previous prime is 249686417. The next prime is 249686441. The reversal of 249686425 is 524686942.

It can be written as a sum of positive squares in 3 ways, for example, as 50537881 + 199148544 = 7109^2 + 14112^2 .

It is not a de Polignac number, because 249686425 - 2³ = 249686417 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4993704 + ... + 4993753.

Almost surely, 2^249686425 is an apocalyptic number.

249686425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

249686425 is a deficient number, since it is larger than the sum of its proper divisors (59924773).

249686425 is an equidigital number, since it uses as much as digits as its factorization.

249686425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9987467 (or 9987462 counting only the distinct ones).

The product of its digits is 829440, while the sum is 46.

The square root of 249686425 is about 15801.4690772725. The cubic root of 249686425 is about 629.6970282533.

The spelling of 249686425 in words is "two hundred forty-nine million, six hundred eighty-six thousand, four hundred twenty-five".