25630447 has 4 divisors (see below), whose sum is σ = 25644816. Its totient is φ = 25616080.

The previous prime is 25630439. The next prime is 25630457. The reversal of 25630447 is 74403652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25630447 - 2³ = 25630439 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25630427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4054 + ... + 8227.

It is an arithmetic number, because the mean of its divisors is an integer number (6411204).

Almost surely, 2^25630447 is an apocalyptic number.

25630447 is a deficient number, since it is larger than the sum of its proper divisors (14369).

25630447 is a wasteful number, since it uses less digits than its factorization.

25630447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14368.

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 25630447 is about 5062.6521705525. The cubic root of 25630447 is about 294.8393149621.

It can be divided in two parts, 256 and 30447, that added together give a palindrome (30703).

The spelling of 25630447 in words is "twenty-five million, six hundred thirty thousand, four hundred forty-seven".