25730261 has 8 divisors (see below), whose sum is σ = 26961984. Its totient is φ = 24508000.

The previous prime is 25730251. The next prime is 25730267. The reversal of 25730261 is 16203752.

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 25730261 - 2¹⁰ = 25729237 is a prime.

It is a super-3 number, since 3×25730261³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25730261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25730267) 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, 3545 + ... + 8001.

It is an arithmetic number, because the mean of its divisors is an integer number (3370248).

Almost surely, 2^25730261 is an apocalyptic number.

It is an amenable number.

25730261 is a deficient number, since it is larger than the sum of its proper divisors (1231723).

25730261 is a wasteful number, since it uses less digits than its factorization.

25730261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4731.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 25730261 is about 5072.5004682109. The cubic root of 25730261 is about 295.2215552901.

The spelling of 25730261 in words is "twenty-five million, seven hundred thirty thousand, two hundred sixty-one".