26564971 has 4 divisors (see below), whose sum is σ = 26774272. Its totient is φ = 26355672.

The previous prime is 26564969. The next prime is 26565037. The reversal of 26564971 is 17946562.

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 26564971 - 2¹ = 26564969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26564921) 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, 104460 + ... + 104713.

It is an arithmetic number, because the mean of its divisors is an integer number (6693568).

Almost surely, 2^26564971 is an apocalyptic number.

26564971 is a deficient number, since it is larger than the sum of its proper divisors (209301).

26564971 is a wasteful number, since it uses less digits than its factorization.

26564971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209300.

The product of its digits is 90720, while the sum is 40.

The square root of 26564971 is about 5154.1217486590. The cubic root of 26564971 is about 298.3800497639.

The spelling of 26564971 in words is "twenty-six million, five hundred sixty-four thousand, nine hundred seventy-one".