25440273 has 12 divisors (see below), whose sum is σ = 37085620. Its totient is φ = 16803936.

The previous prime is 25440271. The next prime is 25440299. The reversal of 25440273 is 37204452.

25440273 is a `hidden beast` number, since 254 + 402 + 7 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 11512449 + 13927824 = 3393^2 + 3732^2 .

It is not a de Polignac number, because 25440273 - 2¹ = 25440271 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25440271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11986 + ... + 13947.

Almost surely, 2^25440273 is an apocalyptic number.

It is an amenable number.

25440273 is a deficient number, since it is larger than the sum of its proper divisors (11645347).

25440273 is a wasteful number, since it uses less digits than its factorization.

25440273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26048 (or 26045 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 27.

The square root of 25440273 is about 5043.8351479802. The cubic root of 25440273 is about 294.1082830344.

The spelling of 25440273 in words is "twenty-five million, four hundred forty thousand, two hundred seventy-three".