25640411 has 4 divisors (see below), whose sum is σ = 25842432. Its totient is φ = 25438392.

The previous prime is 25640401. The next prime is 25640429. The reversal of 25640411 is 11404652.

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 25640411 - 2²² = 21446107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25640401) 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, 100820 + ... + 101073.

It is an arithmetic number, because the mean of its divisors is an integer number (6460608).

Almost surely, 2^25640411 is an apocalyptic number.

25640411 is a deficient number, since it is larger than the sum of its proper divisors (202021).

25640411 is a wasteful number, since it uses less digits than its factorization.

25640411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202020.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 25640411 is about 5063.6361441162. The cubic root of 25640411 is about 294.8775169012.

The spelling of 25640411 in words is "twenty-five million, six hundred forty thousand, four hundred eleven".