249774025 has 6 divisors (see below), whose sum is σ = 309719822. Its totient is φ = 199819200.

The previous prime is 249773999. The next prime is 249774061. The reversal of 249774025 is 520477942.

It can be written as a sum of positive squares in 3 ways, for example, as 76877824 + 172896201 = 8768^2 + 13149^2 .

It is a de Polignac number, because none of the positive numbers 2^k-249774025 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, 4995456 + ... + 4995505.

Almost surely, 2^249774025 is an apocalyptic number.

249774025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

249774025 is a deficient number, since it is larger than the sum of its proper divisors (59945797).

249774025 is an equidigital number, since it uses as much as digits as its factorization.

249774025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9990971 (or 9990966 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 40.

The square root of 249774025 is about 15804.2407283615. The cubic root of 249774025 is about 629.7706606237.

The spelling of 249774025 in words is "two hundred forty-nine million, seven hundred seventy-four thousand, twenty-five".