249452745 has 16 divisors (see below), whose sum is σ = 400263552. Its totient is φ = 132661760.

The previous prime is 249452737. The next prime is 249452783. The reversal of 249452745 is 547254942.

It is a happy number.

It is not a de Polignac number, because 249452745 - 2³ = 249452737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 249452697 and 249452706.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18261 + ... + 28850.

It is an arithmetic number, because the mean of its divisors is an integer number (25016472).

Almost surely, 2^249452745 is an apocalyptic number.

It is an amenable number.

249452745 is a deficient number, since it is larger than the sum of its proper divisors (150810807).

249452745 is a wasteful number, since it uses less digits than its factorization.

249452745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47472.

The product of its digits is 403200, while the sum is 42.

The square root of 249452745 is about 15794.0730972096. The cubic root of 249452745 is about 629.5005237373.

The spelling of 249452745 in words is "two hundred forty-nine million, four hundred fifty-two thousand, seven hundred forty-five".