264139 has 2 divisors, whose sum is σ = 264140. Its totient is φ = 264138.

The previous prime is 264137. The next prime is 264167. The reversal of 264139 is 931462.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 264139 - 2¹ = 264137 is a prime.

It is a super-2 number, since 2×264139² = 139538822642, which contains 22 as substring.

Together with 264137, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (264133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132069 + 132070.

It is an arithmetic number, because the mean of its divisors is an integer number (132070).

2²⁶⁴¹³⁹ is an apocalyptic number.

264139 is a deficient number, since it is larger than the sum of its proper divisors (1).

264139 is an equidigital number, since it uses as much as digits as its factorization.

264139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 25.

The square root of 264139 is about 513.9445495382. The cubic root of 264139 is about 64.1619433940.

The spelling of 264139 in words is "two hundred sixty-four thousand, one hundred thirty-nine".