25012540 has 36 divisors (see below), whose sum is σ = 61104456. Its totient is φ = 8575392.

The previous prime is 25012511. The next prime is 25012543. The reversal of 25012540 is 4521052.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25012543) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11782 + ... + 13741.

It is an arithmetic number, because the mean of its divisors is an integer number (1697346).

Almost surely, 2^25012540 is an apocalyptic number.

25012540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25012540 is an abundant number, since it is smaller than the sum of its proper divisors (36091916).

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

25012540 is a wasteful number, since it uses less digits than its factorization.

25012540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25546 (or 25537 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 25012540 is about 5001.2538427878. The cubic root of 25012540 is about 292.4506552258.

Adding to 25012540 its reverse (4521052), we get a palindrome (29533592).

It can be divided in two parts, 25012 and 540, that added together give a palindrome (25552).

The spelling of 25012540 in words is "twenty-five million, twelve thousand, five hundred forty".