25468781 has 8 divisors (see below), whose sum is σ = 27878424. Its totient is φ = 23123520.

The previous prime is 25468769. The next prime is 25468787. The reversal of 25468781 is 18786452.

It can be written as a sum of positive squares in 4 ways, for example, as 4583881 + 20884900 = 2141^2 + 4570^2 .

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 25468781 - 2¹⁸ = 25206637 is a prime.

It is a super-2 number, since 2×25468781² = 1297317611251922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25468787) 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, 15266 + ... + 16851.

It is an arithmetic number, because the mean of its divisors is an integer number (3484803).

Almost surely, 2^25468781 is an apocalyptic number.

It is an amenable number.

25468781 is a deficient number, since it is larger than the sum of its proper divisors (2409643).

25468781 is a wasteful number, since it uses less digits than its factorization.

25468781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32191.

The product of its digits is 107520, while the sum is 41.

The square root of 25468781 is about 5046.6603808856. The cubic root of 25468781 is about 294.2180998467.

The spelling of 25468781 in words is "twenty-five million, four hundred sixty-eight thousand, seven hundred eighty-one".