25149249 has 24 divisors (see below), whose sum is σ = 37189152. Its totient is φ = 16373760.

The previous prime is 25149247. The next prime is 25149259. The reversal of 25149249 is 94294152.

It is not a de Polignac number, because 25149249 - 2¹ = 25149247 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (25149247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 97729 + ... + 97985.

It is an arithmetic number, because the mean of its divisors is an integer number (1549548).

Almost surely, 2^25149249 is an apocalyptic number.

It is an amenable number.

25149249 is a deficient number, since it is larger than the sum of its proper divisors (12039903).

25149249 is a wasteful number, since it uses less digits than its factorization.

25149249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477 (or 474 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 25149249 is about 5014.9026909802. The cubic root of 25149249 is about 292.9824953530.

The spelling of 25149249 in words is "twenty-five million, one hundred forty-nine thousand, two hundred forty-nine".