25550857 has 2 divisors, whose sum is σ = 25550858. Its totient is φ = 25550856.

The previous prime is 25550849. The next prime is 25550923. The reversal of 25550857 is 75805552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21724921 + 3825936 = 4661^2 + 1956^2 .

It is a cyclic number.

It is not a de Polignac number, because 25550857 - 2³ = 25550849 is a prime.

It is not a weakly prime, because it can be changed into another prime (25550807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12775428 + 12775429.

It is an arithmetic number, because the mean of its divisors is an integer number (12775429).

Almost surely, 2^25550857 is an apocalyptic number.

It is an amenable number.

25550857 is a deficient number, since it is larger than the sum of its proper divisors (1).

25550857 is an equidigital number, since it uses as much as digits as its factorization.

25550857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70000, while the sum is 37.

The square root of 25550857 is about 5054.7855543040. The cubic root of 25550857 is about 294.5338112133.

The spelling of 25550857 in words is "twenty-five million, five hundred fifty thousand, eight hundred fifty-seven".