25406155 has 4 divisors (see below), whose sum is σ = 30487392. Its totient is φ = 20324920.

The previous prime is 25406137. The next prime is 25406159. The reversal of 25406155 is 55160452.

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

It is not a de Polignac number, because 25406155 - 2¹⁷ = 25275083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25406159) 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 3 ways as a sum of consecutive naturals, for example, 2540611 + ... + 2540620.

It is an arithmetic number, because the mean of its divisors is an integer number (7621848).

Almost surely, 2^25406155 is an apocalyptic number.

25406155 is a deficient number, since it is larger than the sum of its proper divisors (5081237).

25406155 is an equidigital number, since it uses as much as digits as its factorization.

25406155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5081236.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 25406155 is about 5040.4518646645. The cubic root of 25406155 is about 293.9767478178.

The spelling of 25406155 in words is "twenty-five million, four hundred six thousand, one hundred fifty-five".