25280285 has 4 divisors (see below), whose sum is σ = 30336348. Its totient is φ = 20224224.

The previous prime is 25280273. The next prime is 25280327. The reversal of 25280285 is 58208252.

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 17322244 + 7958041 = 4162^2 + 2821^2 .

It is a cyclic number.

It is not a de Polignac number, because 25280285 - 2²⁰ = 24231709 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 3 ways as a sum of consecutive naturals, for example, 2528024 + ... + 2528033.

It is an arithmetic number, because the mean of its divisors is an integer number (7584087).

Almost surely, 2^25280285 is an apocalyptic number.

It is an amenable number.

25280285 is a deficient number, since it is larger than the sum of its proper divisors (5056063).

25280285 is an equidigital number, since it uses as much as digits as its factorization.

25280285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5056062.

The product of its (nonzero) digits is 12800, while the sum is 32.

The square root of 25280285 is about 5027.9503776390. The cubic root of 25280285 is about 293.4904597526.

The spelling of 25280285 in words is "twenty-five million, two hundred eighty thousand, two hundred eighty-five".