25172849 has 8 divisors (see below), whose sum is σ = 27415080. Its totient is φ = 22974336.

The previous prime is 25172843. The next prime is 25172867. The reversal of 25172849 is 94827152.

It can be written as a sum of positive squares in 4 ways, for example, as 1940449 + 23232400 = 1393^2 + 4820^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25172849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25172843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9722 + ... + 12035.

It is an arithmetic number, because the mean of its divisors is an integer number (3426885).

Almost surely, 2^25172849 is an apocalyptic number.

It is an amenable number.

25172849 is a deficient number, since it is larger than the sum of its proper divisors (2242231).

25172849 is a wasteful number, since it uses less digits than its factorization.

25172849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21859.

The product of its digits is 40320, while the sum is 38.

The square root of 25172849 is about 5017.2551260625. The cubic root of 25172849 is about 293.0741114114.

The spelling of 25172849 in words is "twenty-five million, one hundred seventy-two thousand, eight hundred forty-nine".