25540237 has 12 divisors (see below), whose sum is σ = 27562080. Its totient is φ = 23600808.

The previous prime is 25540217. The next prime is 25540243. The reversal of 25540237 is 73204552.

It is a de Polignac number, because none of the positive numbers 2^k-25540237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25540217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34768 + ... + 35494.

It is an arithmetic number, because the mean of its divisors is an integer number (2296840).

Almost surely, 2^25540237 is an apocalyptic number.

It is an amenable number.

25540237 is a deficient number, since it is larger than the sum of its proper divisors (2021843).

25540237 is an equidigital number, since it uses as much as digits as its factorization.

25540237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832 (or 789 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 28.

The square root of 25540237 is about 5053.7349554562. The cubic root of 25540237 is about 294.4929987200.

Adding to 25540237 its reverse (73204552), we get a palindrome (98744789).

The spelling of 25540237 in words is "twenty-five million, five hundred forty thousand, two hundred thirty-seven".