25502090 has 8 divisors (see below), whose sum is σ = 45903780. Its totient is φ = 10200832.

The previous prime is 25502033. The next prime is 25502111. The reversal of 25502090 is 9020552.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 25270729 + 231361 = 5027^2 + 481^2 .

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

It is a Curzon 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, 1275095 + ... + 1275114.

Almost surely, 2^25502090 is an apocalyptic number.

25502090 is a deficient number, since it is larger than the sum of its proper divisors (20401690).

25502090 is a wasteful number, since it uses less digits than its factorization.

25502090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2550216.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 25502090 is about 5049.9594057774. The cubic root of 25502090 is about 294.3463070229.

The spelling of 25502090 in words is "twenty-five million, five hundred two thousand, ninety".