25149155 has 4 divisors (see below), whose sum is σ = 30178992. Its totient is φ = 20119320.

The previous prime is 25149151. The next prime is 25149169. The reversal of 25149155 is 55194152.

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

It is not a de Polignac number, because 25149155 - 2² = 25149151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25149151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2514911 + ... + 2514920.

It is an arithmetic number, because the mean of its divisors is an integer number (7544748).

Almost surely, 2^25149155 is an apocalyptic number.

25149155 is a deficient number, since it is larger than the sum of its proper divisors (5029837).

25149155 is an equidigital number, since it uses as much as digits as its factorization.

25149155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5029836.

The product of its digits is 9000, while the sum is 32.

The square root of 25149155 is about 5014.8933189052. The cubic root of 25149155 is about 292.9821303270.

The spelling of 25149155 in words is "twenty-five million, one hundred forty-nine thousand, one hundred fifty-five".