25004540 has 24 divisors (see below), whose sum is σ = 57283632. Its totient is φ = 9092480.

The previous prime is 25004537. The next prime is 25004557. The reversal of 25004540 is 4540052.

It is a happy number.

It is a super-2 number, since 2×25004540² = 1250454041223200, which contains 22 as substring.

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, 56609 + ... + 57048.

It is an arithmetic number, because the mean of its divisors is an integer number (2386818).

Almost surely, 2^25004540 is an apocalyptic number.

25004540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25004540 is an abundant number, since it is smaller than the sum of its proper divisors (32279092).

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

25004540 is a wasteful number, since it uses less digits than its factorization.

25004540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113677 (or 113675 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 25004540 is about 5000.4539793903. The cubic root of 25004540 is about 292.4194728040.

Adding to 25004540 its reverse (4540052), we get a palindrome (29544592).

The spelling of 25004540 in words is "twenty-five million, four thousand, five hundred forty".