25161839 has 4 divisors (see below), whose sum is σ = 26255856. Its totient is φ = 24067824.

The previous prime is 25161809. The next prime is 25161847. The reversal of 25161839 is 93816152.

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

It is a cyclic number.

It is not a de Polignac number, because 25161839 - 2²⁰ = 24113263 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25161799 and 25161808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25161809) 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, 546974 + ... + 547019.

It is an arithmetic number, because the mean of its divisors is an integer number (6563964).

Almost surely, 2^25161839 is an apocalyptic number.

25161839 is a deficient number, since it is larger than the sum of its proper divisors (1094017).

25161839 is a wasteful number, since it uses less digits than its factorization.

25161839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1094016.

The product of its digits is 12960, while the sum is 35.

The square root of 25161839 is about 5016.1577925739. The cubic root of 25161839 is about 293.0313773197.

The spelling of 25161839 in words is "twenty-five million, one hundred sixty-one thousand, eight hundred thirty-nine".