25170249 has 16 divisors (see below), whose sum is σ = 37120832. Its totient is φ = 15069888.

The previous prime is 25170227. The next prime is 25170263. The reversal of 25170249 is 94207152.

It is not a de Polignac number, because 25170249 - 2⁷ = 25170121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25170749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7279 + ... + 10164.

It is an arithmetic number, because the mean of its divisors is an integer number (2320052).

Almost surely, 2^25170249 is an apocalyptic number.

It is an amenable number.

25170249 is a deficient number, since it is larger than the sum of its proper divisors (11950583).

25170249 is a wasteful number, since it uses less digits than its factorization.

25170249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17496.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 25170249 is about 5016.9960135523. The cubic root of 25170249 is about 293.0640209243.

It can be divided in two parts, 251 and 70249, that added together give a triangular number (70500 = T₃₇₅).

The spelling of 25170249 in words is "twenty-five million, one hundred seventy thousand, two hundred forty-nine".