25000537 has 4 divisors (see below), whose sum is σ = 25011216. Its totient is φ = 24989860.

The previous prime is 25000511. The next prime is 25000541. The reversal of 25000537 is 73500052.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25000537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25000597) 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, 139 + ... + 7072.

It is an arithmetic number, because the mean of its divisors is an integer number (6252804).

Almost surely, 2^25000537 is an apocalyptic number.

It is an amenable number.

25000537 is a deficient number, since it is larger than the sum of its proper divisors (10679).

25000537 is an equidigital number, since it uses as much as digits as its factorization.

25000537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10678.

The product of its (nonzero) digits is 1050, while the sum is 22.

The square root of 25000537 is about 5000.0536997116. The cubic root of 25000537 is about 292.4038674030.

Adding to 25000537 its reverse (73500052), we get a palindrome (98500589).

The spelling of 25000537 in words is "twenty-five million, five hundred thirty-seven", and thus it is an aban number.