25550761 has 2 divisors, whose sum is σ = 25550762. Its totient is φ = 25550760.

The previous prime is 25550753. The next prime is 25550783. The reversal of 25550761 is 16705552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22382361 + 3168400 = 4731^2 + 1780^2 .

It is a cyclic number.

It is not a de Polignac number, because 25550761 - 2³ = 25550753 is a prime.

It is not a weakly prime, because it can be changed into another prime (25550731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12775380 + 12775381.

It is an arithmetic number, because the mean of its divisors is an integer number (12775381).

Almost surely, 2^25550761 is an apocalyptic number.

It is an amenable number.

25550761 is a deficient number, since it is larger than the sum of its proper divisors (1).

25550761 is an equidigital number, since it uses as much as digits as its factorization.

25550761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10500, while the sum is 31.

The square root of 25550761 is about 5054.7760583432. The cubic root of 25550761 is about 294.5334423375.

The spelling of 25550761 in words is "twenty-five million, five hundred fifty thousand, seven hundred sixty-one".