25540939 has 8 divisors (see below), whose sum is σ = 25874640. Its totient is φ = 25209600.

The previous prime is 25540927. The next prime is 25540961. The reversal of 25540939 is 93904552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25540939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25540898 and 25540907.

It is not an unprimeable number, because it can be changed into a prime (25540969) 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 7 ways as a sum of consecutive naturals, for example, 31167 + ... + 31975.

It is an arithmetic number, because the mean of its divisors is an integer number (3234330).

Almost surely, 2^25540939 is an apocalyptic number.

25540939 is a deficient number, since it is larger than the sum of its proper divisors (333701).

25540939 is a wasteful number, since it uses less digits than its factorization.

25540939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1181.

The product of its (nonzero) digits is 48600, while the sum is 37.

The square root of 25540939 is about 5053.8044085619. The cubic root of 25540939 is about 294.4956968441.

The spelling of 25540939 in words is "twenty-five million, five hundred forty thousand, nine hundred thirty-nine".