25195540 has 12 divisors (see below), whose sum is σ = 52910676. Its totient is φ = 10078208.

The previous prime is 25195531. The next prime is 25195559. The reversal of 25195540 is 4559152.

It can be written as a sum of positive squares in 2 ways, for example, as 19114384 + 6081156 = 4372^2 + 2466^2 .

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, 629869 + ... + 629908.

It is an arithmetic number, because the mean of its divisors is an integer number (4409223).

Almost surely, 2^25195540 is an apocalyptic number.

25195540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25195540 is an abundant number, since it is smaller than the sum of its proper divisors (27715136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25195540 is a wasteful number, since it uses less digits than its factorization.

25195540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1259786 (or 1259784 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 31.

The square root of 25195540 is about 5019.5159129143. The cubic root of 25195540 is about 293.1621447193.

The spelling of 25195540 in words is "twenty-five million, one hundred ninety-five thousand, five hundred forty".