25638071 has 4 divisors (see below), whose sum is σ = 25665552. Its totient is φ = 25610592.

The previous prime is 25638047. The next prime is 25638073. The reversal of 25638071 is 17083652.

It is a happy number.

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 25638071 - 2¹⁰ = 25637047 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 (25638073) 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, 12290 + ... + 14223.

It is an arithmetic number, because the mean of its divisors is an integer number (6416388).

Almost surely, 2^25638071 is an apocalyptic number.

25638071 is a deficient number, since it is larger than the sum of its proper divisors (27481).

25638071 is an equidigital number, since it uses as much as digits as its factorization.

25638071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27480.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 25638071 is about 5063.4050795882. The cubic root of 25638071 is about 294.8685462392.

The spelling of 25638071 in words is "twenty-five million, six hundred thirty-eight thousand, seventy-one".