25485839 has 4 divisors (see below), whose sum is σ = 26985024. Its totient is φ = 23986656.

The previous prime is 25485827. The next prime is 25485847. The reversal of 25485839 is 93858452.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25485839 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25485839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25485869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 749567 + ... + 749600.

It is an arithmetic number, because the mean of its divisors is an integer number (6746256).

Almost surely, 2^25485839 is an apocalyptic number.

25485839 is a deficient number, since it is larger than the sum of its proper divisors (1499185).

25485839 is a wasteful number, since it uses less digits than its factorization.

25485839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1499184.

The product of its digits is 345600, while the sum is 44.

The square root of 25485839 is about 5048.3501265265. The cubic root of 25485839 is about 294.2837704718.

It can be divided in two parts, 254 and 85839, that multiplied together give a triangular number (21803106 = T₆₆₀₃).

The spelling of 25485839 in words is "twenty-five million, four hundred eighty-five thousand, eight hundred thirty-nine".