25325261 has 4 divisors (see below), whose sum is σ = 27273372. Its totient is φ = 23377152.

The previous prime is 25325243. The next prime is 25325273. The reversal of 25325261 is 16252352.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2102500 + 23222761 = 1450^2 + 4819^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25325261 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25325261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25325281) 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 in 3 ways as a sum of consecutive naturals, for example, 974036 + ... + 974061.

It is an arithmetic number, because the mean of its divisors is an integer number (6818343).

Almost surely, 2^25325261 is an apocalyptic number.

It is an amenable number.

25325261 is a deficient number, since it is larger than the sum of its proper divisors (1948111).

25325261 is a wasteful number, since it uses less digits than its factorization.

25325261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1948110.

The product of its digits is 3600, while the sum is 26.

The square root of 25325261 is about 5032.4209879540. The cubic root of 25325261 is about 293.6644056636.

The spelling of 25325261 in words is "twenty-five million, three hundred twenty-five thousand, two hundred sixty-one".