26570 has 8 divisors (see below), whose sum is σ = 47844. Its totient is φ = 10624.

The previous prime is 26561. The next prime is 26573. The reversal of 26570 is 7562.

It is a Cunningham number, because it is equal to 163²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 26569 + 1 = 163^2 + 1^2 .

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

It is not an unprimeable number, because it can be changed into a prime (26573) 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, 1319 + ... + 1338.

2²⁶⁵⁷⁰ is an apocalyptic number.

26570 is a deficient number, since it is larger than the sum of its proper divisors (21274).

26570 is a wasteful number, since it uses less digits than its factorization.

26570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2664.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 26570 is about 163.0030674558. The cubic root of 26570 is about 29.8398877297.

The spelling of 26570 in words is "twenty-six thousand, five hundred seventy".