25354409 has 4 divisors (see below), whose sum is σ = 25639380. Its totient is φ = 25069440.

The previous prime is 25354403. The next prime is 25354411. The reversal of 25354409 is 90445352.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7546009 + 17808400 = 2747^2 + 4220^2 .

It is a cyclic number.

It is not a de Polignac number, because 25354409 - 2²⁰ = 24305833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25354403) 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, 142352 + ... + 142529.

It is an arithmetic number, because the mean of its divisors is an integer number (6409845).

Almost surely, 2^25354409 is an apocalyptic number.

It is an amenable number.

25354409 is a deficient number, since it is larger than the sum of its proper divisors (284971).

25354409 is an equidigital number, since it uses as much as digits as its factorization.

25354409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284970.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 25354409 is about 5035.3161767659. The cubic root of 25354409 is about 293.7770263952. Note that the first 3 decimals are identical.

The spelling of 25354409 in words is "twenty-five million, three hundred fifty-four thousand, four hundred nine".