25400609 has 8 divisors (see below), whose sum is σ = 27441792. Its totient is φ = 23371920.

The previous prime is 25400593. The next prime is 25400629. The reversal of 25400609 is 90600452.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25400609 - 2⁴ = 25400593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25400629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1352 + ... + 7254.

It is an arithmetic number, because the mean of its divisors is an integer number (3430224).

Almost surely, 2^25400609 is an apocalyptic number.

It is an amenable number.

25400609 is a deficient number, since it is larger than the sum of its proper divisors (2041183).

25400609 is a wasteful number, since it uses less digits than its factorization.

25400609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6247.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 25400609 is about 5039.9016855490. The cubic root of 25400609 is about 293.9553551843.

The spelling of 25400609 in words is "twenty-five million, four hundred thousand, six hundred nine".