25454609 has 4 divisors (see below), whose sum is σ = 25499760. Its totient is φ = 25409460.

The previous prime is 25454603. The next prime is 25454617. The reversal of 25454609 is 90645452.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25454609 - 2²⁴ = 8677393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25454603) 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, 21719 + ... + 22860.

It is an arithmetic number, because the mean of its divisors is an integer number (6374940).

Almost surely, 2^25454609 is an apocalyptic number.

It is an amenable number.

25454609 is a deficient number, since it is larger than the sum of its proper divisors (45151).

25454609 is an equidigital number, since it uses as much as digits as its factorization.

25454609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45150.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 25454609 is about 5045.2560886441. The cubic root of 25454609 is about 294.1635175649.

The spelling of 25454609 in words is "twenty-five million, four hundred fifty-four thousand, six hundred nine".