25555939 has 2 divisors, whose sum is σ = 25555940. Its totient is φ = 25555938.

The previous prime is 25555927. The next prime is 25555951. The reversal of 25555939 is 93955552.

It is a balanced prime because it is at equal distance from previous prime (25555927) and next prime (25555951).

It is a cyclic number.

It is not a de Polignac number, because 25555939 - 2⁹ = 25555427 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25555895 and 25555904.

It is not a weakly prime, because it can be changed into another prime (25555919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12777969 + 12777970.

It is an arithmetic number, because the mean of its divisors is an integer number (12777970).

Almost surely, 2^25555939 is an apocalyptic number.

25555939 is a deficient number, since it is larger than the sum of its proper divisors (1).

25555939 is an equidigital number, since it uses as much as digits as its factorization.

25555939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 303750, while the sum is 43.

The square root of 25555939 is about 5055.2882212590. The cubic root of 25555939 is about 294.5533372590.

The spelling of 25555939 in words is "twenty-five million, five hundred fifty-five thousand, nine hundred thirty-nine".