253949825 has 18 divisors (see below), whose sum is σ = 333853074. Its totient is φ = 190961920.

The previous prime is 253949819. The next prime is 253949827. The reversal of 253949825 is 528949352.

It can be written as a sum of positive squares in 9 ways, for example, as 160073104 + 93876721 = 12652^2 + 9689^2 .

It is not a de Polignac number, because 253949825 - 2⁸ = 253949569 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 253949825.

It is not an unprimeable number, because it can be changed into a prime (253949827) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 328139 + ... + 328911.

It is an arithmetic number, because the mean of its divisors is an integer number (18547393).

Almost surely, 2^253949825 is an apocalyptic number.

253949825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

253949825 is a deficient number, since it is larger than the sum of its proper divisors (79903249).

253949825 is an frugal number, since it uses more digits than its factorization.

253949825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1573 (or 795 counting only the distinct ones).

The product of its digits is 777600, while the sum is 47.

The square root of 253949825 is about 15935.8032430123. The cubic root of 253949825 is about 633.2608496610.

The spelling of 253949825 in words is "two hundred fifty-three million, nine hundred forty-nine thousand, eight hundred twenty-five".