264981 has 4 divisors (see below), whose sum is σ = 353312. Its totient is φ = 176652.

The previous prime is 264977. The next prime is 264991. The reversal of 264981 is 189462.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 264981 - 2² = 264977 is a prime.

It is a super-2 number, since 2×264981² = 140429860722, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44161 + ... + 44166.

It is an arithmetic number, because the mean of its divisors is an integer number (88328).

2²⁶⁴⁹⁸¹ is an apocalyptic number.

It is an amenable number.

264981 is a deficient number, since it is larger than the sum of its proper divisors (88331).

264981 is an equidigital number, since it uses as much as digits as its factorization.

264981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88330.

The product of its digits is 3456, while the sum is 30.

The square root of 264981 is about 514.7630522872. The cubic root of 264981 is about 64.2300477545.

The spelling of 264981 in words is "two hundred sixty-four thousand, nine hundred eighty-one".