262391 has 2 divisors, whose sum is σ = 262392. Its totient is φ = 262390.

The previous prime is 262387. The next prime is 262399. The reversal of 262391 is 193262.

262391 is nontrivially palindromic in base 6.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 262391 - 2² = 262387 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (262399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131195 + 131196.

It is an arithmetic number, because the mean of its divisors is an integer number (131196).

2²⁶²³⁹¹ is an apocalyptic number.

262391 is a deficient number, since it is larger than the sum of its proper divisors (1).

262391 is an equidigital number, since it uses as much as digits as its factorization.

262391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 23.

The square root of 262391 is about 512.2411541452. The cubic root of 262391 is about 64.0200946015.

The spelling of 262391 in words is "two hundred sixty-two thousand, three hundred ninety-one".