25454591 has 4 divisors (see below), whose sum is σ = 25502184. Its totient is φ = 25407000.

The previous prime is 25454587. The next prime is 25454603. The reversal of 25454591 is 19545452.

It is a happy number.

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 25454591 - 2² = 25454587 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 (25454501) 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, 22985 + ... + 24066.

It is an arithmetic number, because the mean of its divisors is an integer number (6375546).

Almost surely, 2^25454591 is an apocalyptic number.

25454591 is a deficient number, since it is larger than the sum of its proper divisors (47593).

25454591 is an equidigital number, since it uses as much as digits as its factorization.

25454591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47592.

The product of its digits is 36000, while the sum is 35.

The square root of 25454591 is about 5045.2543047898. The cubic root of 25454591 is about 294.1634482265.

It can be divided in two parts, 254 and 54591, that added together give a palindrome (54845).

The spelling of 25454591 in words is "twenty-five million, four hundred fifty-four thousand, five hundred ninety-one".