25620647 has 8 divisors (see below), whose sum is σ = 28233744. Its totient is φ = 23099328.

The previous prime is 25620641. The next prime is 25620667. The reversal of 25620647 is 74602652.

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 25620647 - 2⁴ = 25620631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25620641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22358 + ... + 23475.

It is an arithmetic number, because the mean of its divisors is an integer number (3529218).

Almost surely, 2^25620647 is an apocalyptic number.

25620647 is a deficient number, since it is larger than the sum of its proper divisors (2613097).

25620647 is a wasteful number, since it uses less digits than its factorization.

25620647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45889.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 25620647 is about 5061.6842058746. The cubic root of 25620647 is about 294.8017321395.

The spelling of 25620647 in words is "twenty-five million, six hundred twenty thousand, six hundred forty-seven".