155243 has 6 divisors (see below), whose sum is σ = 170772. Its totient is φ = 141020.

The previous prime is 155231. The next prime is 155251. The reversal of 155243 is 342551.

It is a de Polignac number, because none of the positive numbers 2^k-155243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 521 + ... + 762.

It is an arithmetic number, because the mean of its divisors is an integer number (28462).

2¹⁵⁵²⁴³ is an apocalyptic number.

155243 is a deficient number, since it is larger than the sum of its proper divisors (15529).

155243 is a wasteful number, since it uses less digits than its factorization.

155243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1305 (or 1294 counting only the distinct ones).

The product of its digits is 600, while the sum is 20.

The square root of 155243 is about 394.0088831486. The cubic root of 155243 is about 53.7449102806.

Adding to 155243 its reverse (342551), we get a palindrome (497794).

The spelling of 155243 in words is "one hundred fifty-five thousand, two hundred forty-three".