25118161 has 2 divisors, whose sum is σ = 25118162. Its totient is φ = 25118160.

The previous prime is 25118111. The next prime is 25118173. The reversal of 25118161 is 16181152.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24196561 + 921600 = 4919^2 + 960^2 .

It is a cyclic number.

It is not a de Polignac number, because 25118161 - 2¹⁵ = 25085393 is a prime.

It is not a weakly prime, because it can be changed into another prime (25118101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12559080 + 12559081.

It is an arithmetic number, because the mean of its divisors is an integer number (12559081).

Almost surely, 2^25118161 is an apocalyptic number.

It is an amenable number.

25118161 is a deficient number, since it is larger than the sum of its proper divisors (1).

25118161 is an equidigital number, since it uses as much as digits as its factorization.

25118161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 480, while the sum is 25.

The square root of 25118161 is about 5011.8021708763. The cubic root of 25118161 is about 292.8617230863.

The spelling of 25118161 in words is "twenty-five million, one hundred eighteen thousand, one hundred sixty-one".