25997355 has 24 divisors (see below), whose sum is σ = 46733232. Its totient is φ = 13864608.

The previous prime is 25997351. The next prime is 25997357. The reversal of 25997355 is 55379952.

25997355 is a `hidden beast` number, since 2 + 599 + 7 + 3 + 55 = 666.

It is not a de Polignac number, because 25997355 - 2² = 25997351 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 25997355.

It is not an unprimeable number, because it can be changed into a prime (25997351) 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 23 ways as a sum of consecutive naturals, for example, 9484 + ... + 11913.

It is an arithmetic number, because the mean of its divisors is an integer number (1947218).

Almost surely, 2^25997355 is an apocalyptic number.

25997355 is a deficient number, since it is larger than the sum of its proper divisors (20735877).

25997355 is an equidigital number, since it uses as much as digits as its factorization.

25997355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21417 (or 21405 counting only the distinct ones).

The product of its digits is 425250, while the sum is 45.

The square root of 25997355 is about 5098.7601434074. The cubic root of 25997355 is about 296.2395605999.

The spelling of 25997355 in words is "twenty-five million, nine hundred ninety-seven thousand, three hundred fifty-five".