25550839 has 4 divisors (see below), whose sum is σ = 26895640. Its totient is φ = 24206040.

The previous prime is 25550821. The next prime is 25550843. The reversal of 25550839 is 93805552.

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 25550839 - 2⁵ = 25550807 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25550798 and 25550807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25550809) 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, 672372 + ... + 672409.

It is an arithmetic number, because the mean of its divisors is an integer number (6723910).

Almost surely, 2^25550839 is an apocalyptic number.

25550839 is a deficient number, since it is larger than the sum of its proper divisors (1344801).

25550839 is a wasteful number, since it uses less digits than its factorization.

25550839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344800.

The product of its (nonzero) digits is 54000, while the sum is 37.

The square root of 25550839 is about 5054.7837738127. The cubic root of 25550839 is about 294.5337420491.

The spelling of 25550839 in words is "twenty-five million, five hundred fifty thousand, eight hundred thirty-nine".