25611671 has 4 divisors (see below), whose sum is σ = 25860432. Its totient is φ = 25362912.

The previous prime is 25611653. The next prime is 25611689. The reversal of 25611671 is 17611652.

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

It is an interprime number because it is at equal distance from previous prime (25611653) and next prime (25611689).

It is a cyclic number.

It is not a de Polignac number, because 25611671 - 2¹⁰ = 25610647 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 (25611631) 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, 124226 + ... + 124431.

It is an arithmetic number, because the mean of its divisors is an integer number (6465108).

Almost surely, 2^25611671 is an apocalyptic number.

25611671 is a deficient number, since it is larger than the sum of its proper divisors (248761).

25611671 is a wasteful number, since it uses less digits than its factorization.

25611671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248760.

The product of its digits is 2520, while the sum is 29.

The square root of 25611671 is about 5060.7974668030. The cubic root of 25611671 is about 294.7673009322.

The spelling of 25611671 in words is "twenty-five million, six hundred eleven thousand, six hundred seventy-one".