25205590 has 16 divisors (see below), whose sum is σ = 47758320. Its totient is φ = 9551520.

The previous prime is 25205519. The next prime is 25205591. The reversal of 25205590 is 9550252.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25205591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66141 + ... + 66520.

It is an arithmetic number, because the mean of its divisors is an integer number (2984895).

Almost surely, 2^25205590 is an apocalyptic number.

25205590 is a deficient number, since it is larger than the sum of its proper divisors (22552730).

25205590 is a wasteful number, since it uses less digits than its factorization.

25205590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132687.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 25205590 is about 5020.5169056582. The cubic root of 25205590 is about 293.2011183883.

The spelling of 25205590 in words is "twenty-five million, two hundred five thousand, five hundred ninety".