264161 has 4 divisors (see below), whose sum is σ = 273300. Its totient is φ = 255024.

The previous prime is 264139. The next prime is 264167. The reversal of 264161 is 161462.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 78400 + 185761 = 280^2 + 431^2 .

It is a cyclic number.

It is not a de Polignac number, because 264161 - 2¹⁸ = 2017 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 (264167) 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, 4526 + ... + 4583.

It is an arithmetic number, because the mean of its divisors is an integer number (68325).

2²⁶⁴¹⁶¹ is an apocalyptic number.

It is an amenable number.

264161 is a deficient number, since it is larger than the sum of its proper divisors (9139).

264161 is an equidigital number, since it uses as much as digits as its factorization.

264161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9138.

The product of its digits is 288, while the sum is 20.

The square root of 264161 is about 513.9659521797. The cubic root of 264161 is about 64.1637246829.

The spelling of 264161 in words is "two hundred sixty-four thousand, one hundred sixty-one".