25642011 has 8 divisors (see below), whose sum is σ = 34261504. Its totient is φ = 17058600.

The previous prime is 25642007. The next prime is 25642013. The reversal of 25642011 is 11024652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25642011 - 2² = 25642007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25642013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7315 + ... + 10236.

It is an arithmetic number, because the mean of its divisors is an integer number (4282688).

Almost surely, 2^25642011 is an apocalyptic number.

25642011 is a deficient number, since it is larger than the sum of its proper divisors (8619493).

25642011 is a wasteful number, since it uses less digits than its factorization.

25642011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18041.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 25642011 is about 5063.7941308864. The cubic root of 25642011 is about 294.8836503730.

Adding to 25642011 its reverse (11024652), we get a palindrome (36666663).

The spelling of 25642011 in words is "twenty-five million, six hundred forty-two thousand, eleven".