25899161 has 4 divisors (see below), whose sum is σ = 25926912. Its totient is φ = 25871412.

The previous prime is 25899157. The next prime is 25899169. The reversal of 25899161 is 16199852.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25899161 - 2² = 25899157 is a prime.

It is a super-3 number, since 3×25899161³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25899169) 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 3 ways as a sum of consecutive naturals, for example, 12425 + ... + 14358.

It is an arithmetic number, because the mean of its divisors is an integer number (6481728).

Almost surely, 2^25899161 is an apocalyptic number.

It is an amenable number.

25899161 is a deficient number, since it is larger than the sum of its proper divisors (27751).

25899161 is an equidigital number, since it uses as much as digits as its factorization.

25899161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27750.

The product of its digits is 38880, while the sum is 41.

The square root of 25899161 is about 5089.1218299428. The cubic root of 25899161 is about 295.8661168632.

The spelling of 25899161 in words is "twenty-five million, eight hundred ninety-nine thousand, one hundred sixty-one".