25503040 has 28 divisors (see below), whose sum is σ = 60729876. Its totient is φ = 10201088.

The previous prime is 25503019. The next prime is 25503041. The reversal of 25503040 is 4030552.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9884736 + 15618304 = 3144^2 + 3952^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25502999 and 25503017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25503041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39529 + ... + 40168.

Almost surely, 2^25503040 is an apocalyptic number.

25503040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25503040 is an abundant number, since it is smaller than the sum of its proper divisors (35226836).

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

25503040 is an equidigital number, since it uses as much as digits as its factorization.

25503040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79714 (or 79704 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 19.

The square root of 25503040 is about 5050.0534650635. The cubic root of 25503040 is about 294.3499619588.

Adding to 25503040 its reverse (4030552), we get a palindrome (29533592).

The spelling of 25503040 in words is "twenty-five million, five hundred three thousand, forty".