25203540 has 48 divisors (see below), whose sum is σ = 71285760. Its totient is φ = 6652800.

The previous prime is 25203533. The next prime is 25203551. The reversal of 25203540 is 4530252.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3981 + ... + 8139.

It is an arithmetic number, because the mean of its divisors is an integer number (1485120).

Almost surely, 2^25203540 is an apocalyptic number.

25203540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25203540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35642880).

25203540 is an abundant number, since it is smaller than the sum of its proper divisors (46082220).

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

25203540 is a wasteful number, since it uses less digits than its factorization.

25203540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4272 (or 4270 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 25203540 is about 5020.3127392624. The cubic root of 25203540 is about 293.1931693766.

Adding to 25203540 its reverse (4530252), we get a palindrome (29733792).

The spelling of 25203540 in words is "twenty-five million, two hundred three thousand, five hundred forty".