25540545 has 32 divisors (see below), whose sum is σ = 44454528. Its totient is φ = 12469248.

The previous prime is 25540531. The next prime is 25540547. The reversal of 25540545 is 54504552.

It is not a de Polignac number, because 25540545 - 2⁵ = 25540513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25540547) 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 31 ways as a sum of consecutive naturals, for example, 8082 + ... + 10788.

It is an arithmetic number, because the mean of its divisors is an integer number (1389204).

Almost surely, 2^25540545 is an apocalyptic number.

It is an amenable number.

25540545 is a deficient number, since it is larger than the sum of its proper divisors (18913983).

25540545 is a wasteful number, since it uses less digits than its factorization.

25540545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2769.

The product of its (nonzero) digits is 20000, while the sum is 30.

The square root of 25540545 is about 5053.7654278765. The cubic root of 25540545 is about 294.4941825184.

The spelling of 25540545 in words is "twenty-five million, five hundred forty thousand, five hundred forty-five".