25647011 has 4 divisors (see below), whose sum is σ = 27619872. Its totient is φ = 23674152.

The previous prime is 25646993. The next prime is 25647019. The reversal of 25647011 is 11074652.

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 25647011 - 2⁶ = 25646947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25647019) 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, 986411 + ... + 986436.

It is an arithmetic number, because the mean of its divisors is an integer number (6904968).

Almost surely, 2^25647011 is an apocalyptic number.

25647011 is a deficient number, since it is larger than the sum of its proper divisors (1972861).

25647011 is a wasteful number, since it uses less digits than its factorization.

25647011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1972860.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 25647011 is about 5064.2878077771. The cubic root of 25647011 is about 294.9028158280.

The spelling of 25647011 in words is "twenty-five million, six hundred forty-seven thousand, eleven".