25867139 has 2 divisors, whose sum is σ = 25867140. Its totient is φ = 25867138.

The previous prime is 25867103. The next prime is 25867201. The reversal of 25867139 is 93176852.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25867139 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 25867096 and 25867105.

It is not a weakly prime, because it can be changed into another prime (25869139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12933569 + 12933570.

It is an arithmetic number, because the mean of its divisors is an integer number (12933570).

Almost surely, 2^25867139 is an apocalyptic number.

25867139 is a deficient number, since it is larger than the sum of its proper divisors (1).

25867139 is an equidigital number, since it uses as much as digits as its factorization.

25867139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 41.

The square root of 25867139 is about 5085.9747345027. The cubic root of 25867139 is about 295.7441292288.

The spelling of 25867139 in words is "twenty-five million, eight hundred sixty-seven thousand, one hundred thirty-nine".