25170289 has 9 divisors (see below), whose sum is σ = 26219713. Its totient is φ = 24161872.

The previous prime is 25170287. The next prime is 25170293. The reversal of 25170289 is 98207152.

The square root of 25170289 is 5017.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 5880625 + 19289664 = 2425^2 + 4392^2 .

It is not a de Polignac number, because 25170289 - 2¹ = 25170287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25170287) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 145407 + ... + 145579.

Almost surely, 2^25170289 is an apocalyptic number.

25170289 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

25170289 is the 5017-th square number.

25170289 is the 2509-th centered octagonal number.

It is an amenable number.

25170289 is a deficient number, since it is larger than the sum of its proper divisors (1049424).

25170289 is an frugal number, since it uses more digits than its factorization.

25170289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404 (or 202 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 34.

The cubic root of 25170289 is about 293.0641761679.

The spelling of 25170289 in words is "twenty-five million, one hundred seventy thousand, two hundred eighty-nine".