155843 has 4 divisors (see below), whose sum is σ = 157488. Its totient is φ = 154200.

The previous prime is 155833. The next prime is 155849. The reversal of 155843 is 348551.

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

It is a cyclic number.

It is not a de Polignac number, because 155843 - 2¹⁴ = 139459 is a prime.

It is a Duffinian number.

It is a plaindrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (155849) 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, 671 + ... + 872.

It is an arithmetic number, because the mean of its divisors is an integer number (39372).

2¹⁵⁵⁸⁴³ is an apocalyptic number.

155843 is a deficient number, since it is larger than the sum of its proper divisors (1645).

155843 is a wasteful number, since it uses less digits than its factorization.

155843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1644.

The product of its digits is 2400, while the sum is 26.

The square root of 155843 is about 394.7695530306. The cubic root of 155843 is about 53.8140609913.

The spelling of 155843 in words is "one hundred fifty-five thousand, eight hundred forty-three".