264187 has 16 divisors (see below), whose sum is σ = 340992. Its totient is φ = 198720.

The previous prime is 264179. The next prime is 264211. The reversal of 264187 is 781462.

It is a cyclic number.

It is not a de Polignac number, because 264187 - 2³ = 264179 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (264127) 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 15 ways as a sum of consecutive naturals, for example, 3583 + ... + 3655.

It is an arithmetic number, because the mean of its divisors is an integer number (21312).

2²⁶⁴¹⁸⁷ is an apocalyptic number.

264187 is a deficient number, since it is larger than the sum of its proper divisors (76805).

264187 is a wasteful number, since it uses less digits than its factorization.

264187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138.

The product of its digits is 2688, while the sum is 28.

The square root of 264187 is about 513.9912450616. The cubic root of 264187 is about 64.1658297149.

The spelling of 264187 in words is "two hundred sixty-four thousand, one hundred eighty-seven".