249972575 has 6 divisors (see below), whose sum is σ = 309966024. Its totient is φ = 199978040.

The previous prime is 249972559. The next prime is 249972577. The reversal of 249972575 is 575279942.

It is not a de Polignac number, because 249972575 - 2⁴ = 249972559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249972577) 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, 4999427 + ... + 4999476.

It is an arithmetic number, because the mean of its divisors is an integer number (51661004).

Almost surely, 2^249972575 is an apocalyptic number.

249972575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

249972575 is a deficient number, since it is larger than the sum of its proper divisors (59993449).

249972575 is an equidigital number, since it uses as much as digits as its factorization.

249972575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9998913 (or 9998908 counting only the distinct ones).

The product of its digits is 1587600, while the sum is 50.

The square root of 249972575 is about 15810.5210224078. The cubic root of 249972575 is about 629.9374885485.

It can be divided in two parts, 24997 and 2575, that added together give a palindrome (27572).

The spelling of 249972575 in words is "two hundred forty-nine million, nine hundred seventy-two thousand, five hundred seventy-five".