25553140 has 12 divisors (see below), whose sum is σ = 53661636. Its totient is φ = 10221248.

The previous prime is 25553123. The next prime is 25553153. The reversal of 25553140 is 4135552.

It can be written as a sum of positive squares in 2 ways, for example, as 11370384 + 14182756 = 3372^2 + 3766^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 638809 + ... + 638848.

It is an arithmetic number, because the mean of its divisors is an integer number (4471803).

Almost surely, 2^25553140 is an apocalyptic number.

25553140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25553140 is an abundant number, since it is smaller than the sum of its proper divisors (28108496).

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

25553140 is a wasteful number, since it uses less digits than its factorization.

25553140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1277666 (or 1277664 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 25553140 is about 5055.0113748636. The cubic root of 25553140 is about 294.5425832695.

Adding to 25553140 its reverse (4135552), we get a palindrome (29688692).

The spelling of 25553140 in words is "twenty-five million, five hundred fifty-three thousand, one hundred forty".