25530140 has 24 divisors (see below), whose sum is σ = 53751600. Its totient is φ = 10185728.

The previous prime is 25530139. The next prime is 25530151. The reversal of 25530140 is 4103552.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7559 + ... + 10401.

It is an arithmetic number, because the mean of its divisors is an integer number (2239650).

Almost surely, 2^25530140 is an apocalyptic number.

25530140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25530140 is an abundant number, since it is smaller than the sum of its proper divisors (28221460).

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

25530140 is a wasteful number, since it uses less digits than its factorization.

25530140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3301 (or 3299 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 25530140 is about 5052.7358925636. The cubic root of 25530140 is about 294.4541856145.

Adding to 25530140 its reverse (4103552), we get a palindrome (29633692).

The spelling of 25530140 in words is "twenty-five million, five hundred thirty thousand, one hundred forty".