25784961 has 8 divisors (see below), whose sum is σ = 34427520. Its totient is φ = 17166192.

The previous prime is 25784959. The next prime is 25784981. The reversal of 25784961 is 16948752.

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

It is not a de Polignac number, because 25784961 - 2¹ = 25784959 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25784951) 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, 3241 + ... + 7878.

It is an arithmetic number, because the mean of its divisors is an integer number (4303440).

Almost surely, 2^25784961 is an apocalyptic number.

It is an amenable number.

25784961 is a deficient number, since it is larger than the sum of its proper divisors (8642559).

25784961 is a wasteful number, since it uses less digits than its factorization.

25784961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11895.

The product of its digits is 120960, while the sum is 42.

The square root of 25784961 is about 5077.8894237665. The cubic root of 25784961 is about 295.4306111966.

The spelling of 25784961 in words is "twenty-five million, seven hundred eighty-four thousand, nine hundred sixty-one".