25505090 has 16 divisors (see below), whose sum is σ = 49440888. Its totient is φ = 9417216.

The previous prime is 25505059. The next prime is 25505093. The reversal of 25505090 is 9050552.

It can be written as a sum of positive squares in 4 ways, for example, as 10843849 + 14661241 = 3293^2 + 3829^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (25505093) 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, 97967 + ... + 98226.

Almost surely, 2^25505090 is an apocalyptic number.

25505090 is a deficient number, since it is larger than the sum of its proper divisors (23935798).

25505090 is a wasteful number, since it uses less digits than its factorization.

25505090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196213.

The product of its (nonzero) digits is 2250, while the sum is 26.

The square root of 25505090 is about 5050.2564291331. The cubic root of 25505090 is about 294.3578486167.

The spelling of 25505090 in words is "twenty-five million, five hundred five thousand, ninety".