155546 has 4 divisors (see below), whose sum is σ = 233322. Its totient is φ = 77772.

The previous prime is 155539. The next prime is 155557. The reversal of 155546 is 645551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 645551 = 229 ⋅2819.

It can be written as a sum of positive squares in only one way, i.e., 151321 + 4225 = 389^2 + 65^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 38885 + ... + 38888.

155546 is a Friedman number, since it can be written as 5*(5+6^5*4)+1, using all its digits and the basic arithmetic operations.

2¹⁵⁵⁵⁴⁶ is an apocalyptic number.

155546 is a deficient number, since it is larger than the sum of its proper divisors (77776).

155546 is an equidigital number, since it uses as much as digits as its factorization.

155546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77775.

The product of its digits is 3000, while the sum is 26.

The square root of 155546 is about 394.3932048096. The cubic root of 155546 is about 53.7798536159.

The spelling of 155546 in words is "one hundred fifty-five thousand, five hundred forty-six".