25285405 has 8 divisors (see below), whose sum is σ = 30564792. Its totient is φ = 20080128.

The previous prime is 25285387. The next prime is 25285411. The reversal of 25285405 is 50458252.

It can be written as a sum of positive squares in 4 ways, for example, as 11042329 + 14243076 = 3323^2 + 3774^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 25285405 - 2⁵ = 25285373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17772 + ... + 19141.

It is an arithmetic number, because the mean of its divisors is an integer number (3820599).

Almost surely, 2^25285405 is an apocalyptic number.

It is an amenable number.

25285405 is a deficient number, since it is larger than the sum of its proper divisors (5279387).

25285405 is a wasteful number, since it uses less digits than its factorization.

25285405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37055.

The product of its (nonzero) digits is 16000, while the sum is 31.

The square root of 25285405 is about 5028.4595056538. The cubic root of 25285405 is about 293.5102718937.

The spelling of 25285405 in words is "twenty-five million, two hundred eighty-five thousand, four hundred five".