25994921 has 8 divisors (see below), whose sum is σ = 27569664. Its totient is φ = 24425280.

The previous prime is 25994911. The next prime is 25994929. The reversal of 25994921 is 12949952.

It is a happy number.

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 25994921 - 2¹⁰ = 25993897 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25994929) 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, 16076 + ... + 17618.

It is an arithmetic number, because the mean of its divisors is an integer number (3446208).

Almost surely, 2^25994921 is an apocalyptic number.

It is an amenable number.

25994921 is a deficient number, since it is larger than the sum of its proper divisors (1574743).

25994921 is a wasteful number, since it uses less digits than its factorization.

25994921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2551.

The product of its digits is 58320, while the sum is 41.

The square root of 25994921 is about 5098.5214523428. The cubic root of 25994921 is about 296.2303151774.

The spelling of 25994921 in words is "twenty-five million, nine hundred ninety-four thousand, nine hundred twenty-one".