25403161 has 16 divisors (see below), whose sum is σ = 29859840. Its totient is φ = 21162960.

The previous prime is 25403129. The next prime is 25403173. The reversal of 25403161 is 16130452.

It is not a de Polignac number, because 25403161 - 2⁵ = 25403129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25403111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38940 + ... + 39586.

It is an arithmetic number, because the mean of its divisors is an integer number (1866240).

Almost surely, 2^25403161 is an apocalyptic number.

It is an amenable number.

25403161 is a deficient number, since it is larger than the sum of its proper divisors (4456679).

25403161 is an equidigital number, since it uses as much as digits as its factorization.

25403161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 25403161 is about 5040.1548587320. The cubic root of 25403161 is about 293.9651994226.

The spelling of 25403161 in words is "twenty-five million, four hundred three thousand, one hundred sixty-one".