25862839 has 2 divisors, whose sum is σ = 25862840. Its totient is φ = 25862838.

The previous prime is 25862821. The next prime is 25862843. The reversal of 25862839 is 93826852.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25862839 - 2¹⁵ = 25830071 is a prime.

It is a super-2 number, since 2×25862839² = 1337772882279842, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25862795 and 25862804.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25862869) 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 as a sum of consecutive naturals, namely, 12931419 + 12931420.

It is an arithmetic number, because the mean of its divisors is an integer number (12931420).

Almost surely, 2^25862839 is an apocalyptic number.

25862839 is a deficient number, since it is larger than the sum of its proper divisors (1).

25862839 is an equidigital number, since it uses as much as digits as its factorization.

25862839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 43.

The square root of 25862839 is about 5085.5519857730. The cubic root of 25862839 is about 295.7277407364.

The spelling of 25862839 in words is "twenty-five million, eight hundred sixty-two thousand, eight hundred thirty-nine".