25601155 has 4 divisors (see below), whose sum is σ = 30721392. Its totient is φ = 20480920.

The previous prime is 25601153. The next prime is 25601197. The reversal of 25601155 is 55110652.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 25601155 - 2¹ = 25601153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25601153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2560111 + ... + 2560120.

It is an arithmetic number, because the mean of its divisors is an integer number (7680348).

Almost surely, 2^25601155 is an apocalyptic number.

25601155 is a deficient number, since it is larger than the sum of its proper divisors (5120237).

25601155 is an equidigital number, since it uses as much as digits as its factorization.

25601155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5120236.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 25601155 is about 5059.7583934413. The cubic root of 25601155 is about 294.7269521750.

The spelling of 25601155 in words is "twenty-five million, six hundred one thousand, one hundred fifty-five".