249975450 has 48 divisors (see below), whose sum is σ = 688824960. Its totient is φ = 66659760.

The previous prime is 249975443. The next prime is 249975493. The reversal of 249975450 is 54579942.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 249975396 and 249975405.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 91234 + ... + 93933.

It is an arithmetic number, because the mean of its divisors is an integer number (14350520).

Almost surely, 2^249975450 is an apocalyptic number.

249975450 is an abundant number, since it is smaller than the sum of its proper divisors (438849510).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

249975450 is a wasteful number, since it uses less digits than its factorization.

249975450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185188 (or 185177 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 45.

The square root of 249975450 is about 15810.6119426163. The cubic root of 249975450 is about 629.9399035646.

The spelling of 249975450 in words is "two hundred forty-nine million, nine hundred seventy-five thousand, four hundred fifty".