155541 has 8 divisors (see below), whose sum is σ = 209440. Its totient is φ = 102672.

The previous prime is 155539. The next prime is 155557. The reversal of 155541 is 145551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 155541 - 2¹ = 155539 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155501) 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 7 ways as a sum of consecutive naturals, for example, 231 + ... + 603.

It is an arithmetic number, because the mean of its divisors is an integer number (26180).

2¹⁵⁵⁵⁴¹ is an apocalyptic number.

It is an amenable number.

155541 is a deficient number, since it is larger than the sum of its proper divisors (53899).

155541 is a wasteful number, since it uses less digits than its factorization.

155541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515.

The product of its digits is 500, while the sum is 21.

The square root of 155541 is about 394.3868659071. The cubic root of 155541 is about 53.7792773616.

It can be divided in two parts, 1555 and 41, that added together give a triangular number (1596 = T₅₆).

The spelling of 155541 in words is "one hundred fifty-five thousand, five hundred forty-one".