25264609 has 4 divisors (see below), whose sum is σ = 25305280. Its totient is φ = 25223940.

The previous prime is 25264579. The next prime is 25264627. The reversal of 25264609 is 90646252.

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 25264609 - 2²³ = 16876001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25264009) 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, 19389 + ... + 20650.

It is an arithmetic number, because the mean of its divisors is an integer number (6326320).

Almost surely, 2^25264609 is an apocalyptic number.

It is an amenable number.

25264609 is a deficient number, since it is larger than the sum of its proper divisors (40671).

25264609 is an equidigital number, since it uses as much as digits as its factorization.

25264609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40670.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 25264609 is about 5026.3912501913. The cubic root of 25264609 is about 293.4297839106.

The spelling of 25264609 in words is "twenty-five million, two hundred sixty-four thousand, six hundred nine".