25573249 has 9 divisors (see below), whose sum is σ = 27763113. Its totient is φ = 23545392.

The previous prime is 25573243. The next prime is 25573271. The reversal of 25573249 is 94237552.

The square root of 25573249 is 5057.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 9828225 + 15745024 = 3135^2 + 3968^2 .

It is not a de Polignac number, because 25573249 - 2³ = 25573241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25573241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 65547 + ... + 65935.

Almost surely, 2^25573249 is an apocalyptic number.

25573249 is the 5057-th square number.

25573249 is the 2529-th centered octagonal number.

It is an amenable number.

25573249 is a deficient number, since it is larger than the sum of its proper divisors (2189864).

25573249 is an frugal number, since it uses more digits than its factorization.

25573249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804 (or 402 counting only the distinct ones).

The product of its digits is 75600, while the sum is 37.

The cubic root of 25573249 is about 294.6198262724.

The spelling of 25573249 in words is "twenty-five million, five hundred seventy-three thousand, two hundred forty-nine".