25105139 has 2 divisors, whose sum is σ = 25105140. Its totient is φ = 25105138.

The previous prime is 25105127. The next prime is 25105147. The reversal of 25105139 is 93150152.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25105139 - 2⁴ = 25105123 is a prime.

It is not a weakly prime, because it can be changed into another prime (25105439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12552569 + 12552570.

It is an arithmetic number, because the mean of its divisors is an integer number (12552570).

Almost surely, 2^25105139 is an apocalyptic number.

25105139 is a deficient number, since it is larger than the sum of its proper divisors (1).

25105139 is an equidigital number, since it uses as much as digits as its factorization.

25105139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1350, while the sum is 26.

The square root of 25105139 is about 5010.5028689743. The cubic root of 25105139 is about 292.8111049356.

The spelling of 25105139 in words is "twenty-five million, one hundred five thousand, one hundred thirty-nine".