25464647 has 16 divisors (see below), whose sum is σ = 28449792. Its totient is φ = 22643040.

The previous prime is 25464641. The next prime is 25464653. The reversal of 25464647 is 74646452.

It is an interprime number because it is at equal distance from previous prime (25464641) and next prime (25464653).

It is a cyclic number.

It is not a de Polignac number, because 25464647 - 2⁶ = 25464583 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25464647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25464641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43088 + ... + 43674.

It is an arithmetic number, because the mean of its divisors is an integer number (1778112).

Almost surely, 2^25464647 is an apocalyptic number.

25464647 is a deficient number, since it is larger than the sum of its proper divisors (2985145).

25464647 is a wasteful number, since it uses less digits than its factorization.

25464647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718.

The product of its digits is 161280, while the sum is 38.

The square root of 25464647 is about 5046.2507864750. The cubic root of 25464647 is about 294.2021801810.

The spelling of 25464647 in words is "twenty-five million, four hundred sixty-four thousand, six hundred forty-seven".