25877261 has 2 divisors, whose sum is σ = 25877262. Its totient is φ = 25877260.

The previous prime is 25877239. The next prime is 25877279. The reversal of 25877261 is 16277852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24314761 + 1562500 = 4931^2 + 1250^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25877261 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25877561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12938630 + 12938631.

It is an arithmetic number, because the mean of its divisors is an integer number (12938631).

Almost surely, 2^25877261 is an apocalyptic number.

It is an amenable number.

25877261 is a deficient number, since it is larger than the sum of its proper divisors (1).

25877261 is an equidigital number, since it uses as much as digits as its factorization.

25877261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47040, while the sum is 38.

The square root of 25877261 is about 5086.9697266644. The cubic root of 25877261 is about 295.7826998092.

The spelling of 25877261 in words is "twenty-five million, eight hundred seventy-seven thousand, two hundred sixty-one".