25452391 has 4 divisors (see below), whose sum is σ = 25489000. Its totient is φ = 25415784.

The previous prime is 25452389. The next prime is 25452403. The reversal of 25452391 is 19325452.

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

It is a cyclic number.

It is not a de Polignac number, because 25452391 - 2¹ = 25452389 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 (25452331) 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, 17241 + ... + 18658.

It is an arithmetic number, because the mean of its divisors is an integer number (6372250).

Almost surely, 2^25452391 is an apocalyptic number.

25452391 is a deficient number, since it is larger than the sum of its proper divisors (36609).

25452391 is an equidigital number, since it uses as much as digits as its factorization.

25452391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36608.

The product of its digits is 10800, while the sum is 31.

The square root of 25452391 is about 5045.0362734078. The cubic root of 25452391 is about 294.1549732886.

The spelling of 25452391 in words is "twenty-five million, four hundred fifty-two thousand, three hundred ninety-one".