25398253 has 4 divisors (see below), whose sum is σ = 25419420. Its totient is φ = 25377088.

The previous prime is 25398223. The next prime is 25398257. The reversal of 25398253 is 35289352.

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

It can be written as a sum of positive squares in 2 ways, for example, as 20912329 + 4485924 = 4573^2 + 2118^2 .

It is a cyclic number.

It is not a de Polignac number, because 25398253 - 2⁹ = 25397741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25398257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8668 + ... + 11221.

It is an arithmetic number, because the mean of its divisors is an integer number (6354855).

Almost surely, 2^25398253 is an apocalyptic number.

It is an amenable number.

25398253 is a deficient number, since it is larger than the sum of its proper divisors (21167).

25398253 is a wasteful number, since it uses less digits than its factorization.

25398253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21166.

The product of its digits is 64800, while the sum is 37.

The square root of 25398253 is about 5039.6679454107. The cubic root of 25398253 is about 293.9462664228.

It can be divided in two parts, 25398 and 253, that added together give a triangular number (25651 = T₂₂₆).

The spelling of 25398253 in words is "twenty-five million, three hundred ninety-eight thousand, two hundred fifty-three".