25751261 has 4 divisors (see below), whose sum is σ = 26104092. Its totient is φ = 25398432.

The previous prime is 25751221. The next prime is 25751267. The reversal of 25751261 is 16215752.

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 9703225 + 16048036 = 3115^2 + 4006^2 .

It is a cyclic number.

It is not a de Polignac number, because 25751261 - 2¹⁰ = 25750237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25751267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176306 + ... + 176451.

It is an arithmetic number, because the mean of its divisors is an integer number (6526023).

Almost surely, 2^25751261 is an apocalyptic number.

It is an amenable number.

25751261 is a deficient number, since it is larger than the sum of its proper divisors (352831).

25751261 is an equidigital number, since it uses as much as digits as its factorization.

25751261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352830.

The product of its digits is 4200, while the sum is 29.

The square root of 25751261 is about 5074.5700310470. The cubic root of 25751261 is about 295.3018494204.

The spelling of 25751261 in words is "twenty-five million, seven hundred fifty-one thousand, two hundred sixty-one".