25555787 has 2 divisors, whose sum is σ = 25555788. Its totient is φ = 25555786.

The previous prime is 25555781. The next prime is 25555793. The reversal of 25555787 is 78755552.

It is a balanced prime because it is at equal distance from previous prime (25555781) and next prime (25555793).

It is a cyclic number.

It is not a de Polignac number, because 25555787 - 2⁸ = 25555531 is a prime.

It is not a weakly prime, because it can be changed into another prime (25555781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12777893 + 12777894.

It is an arithmetic number, because the mean of its divisors is an integer number (12777894).

Almost surely, 2^25555787 is an apocalyptic number.

25555787 is a deficient number, since it is larger than the sum of its proper divisors (1).

25555787 is an equidigital number, since it uses as much as digits as its factorization.

25555787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 490000, while the sum is 44.

The square root of 25555787 is about 5055.2731874746. The cubic root of 25555787 is about 294.5527532826.

The spelling of 25555787 in words is "twenty-five million, five hundred fifty-five thousand, seven hundred eighty-seven".