25945501 has 2 divisors, whose sum is σ = 25945502. Its totient is φ = 25945500.

The previous prime is 25945483. The next prime is 25945523. The reversal of 25945501 is 10554952.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19448100 + 6497401 = 4410^2 + 2549^2 .

It is a cyclic number.

It is not a de Polignac number, because 25945501 - 2⁷ = 25945373 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25945531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12972750 + 12972751.

It is an arithmetic number, because the mean of its divisors is an integer number (12972751).

Almost surely, 2^25945501 is an apocalyptic number.

It is an amenable number.

25945501 is a deficient number, since it is larger than the sum of its proper divisors (1).

25945501 is an equidigital number, since it uses as much as digits as its factorization.

25945501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9000, while the sum is 31.

The square root of 25945501 is about 5093.6726435844. The cubic root of 25945501 is about 296.0424709268.

The spelling of 25945501 in words is "twenty-five million, nine hundred forty-five thousand, five hundred one".