25822721 has 8 divisors (see below), whose sum is σ = 27815424. Its totient is φ = 23902560.

The previous prime is 25822679. The next prime is 25822723. The reversal of 25822721 is 12722852.

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 25822721 - 2²² = 21628417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25822723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17396 + ... + 18821.

It is an arithmetic number, because the mean of its divisors is an integer number (3476928).

Almost surely, 2^25822721 is an apocalyptic number.

It is an amenable number.

25822721 is a deficient number, since it is larger than the sum of its proper divisors (1992703).

25822721 is a wasteful number, since it uses less digits than its factorization.

25822721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36271.

The product of its digits is 4480, while the sum is 29.

The square root of 25822721 is about 5081.6061437305. The cubic root of 25822721 is about 295.5747523089.

The spelling of 25822721 in words is "twenty-five million, eight hundred twenty-two thousand, seven hundred twenty-one".