25757261 has 8 divisors (see below), whose sum is σ = 27323640. Its totient is φ = 24196608.

The previous prime is 25757257. The next prime is 25757273. The reversal of 25757261 is 16275752.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 62500 + 25694761 = 250^2 + 5069^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25757261 - 2² = 25757257 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 (25757231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10985 + ... + 13121.

It is an arithmetic number, because the mean of its divisors is an integer number (3415455).

Almost surely, 2^25757261 is an apocalyptic number.

It is an amenable number.

25757261 is a deficient number, since it is larger than the sum of its proper divisors (1566379).

25757261 is a wasteful number, since it uses less digits than its factorization.

25757261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2863.

The product of its digits is 29400, while the sum is 35.

The square root of 25757261 is about 5075.1611797065. The cubic root of 25757261 is about 295.3247825822.

The spelling of 25757261 in words is "twenty-five million, seven hundred fifty-seven thousand, two hundred sixty-one".