155949 has 8 divisors (see below), whose sum is σ = 209760. Its totient is φ = 103056.

The previous prime is 155921. The next prime is 156007. The reversal of 155949 is 949551.

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

It is not a de Polignac number, because 155949 - 2⁷ = 155821 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 155949.

It is not an unprimeable number, because it can be changed into a prime (155849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 567 + ... + 795.

It is an arithmetic number, because the mean of its divisors is an integer number (26220).

2¹⁵⁵⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

155949 is a deficient number, since it is larger than the sum of its proper divisors (53811).

155949 is a wasteful number, since it uses less digits than its factorization.

155949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459.

The product of its digits is 8100, while the sum is 33.

The square root of 155949 is about 394.9037857504. The cubic root of 155949 is about 53.8262591600.

The spelling of 155949 in words is "one hundred fifty-five thousand, nine hundred forty-nine".