155149 has 4 divisors (see below), whose sum is σ = 156636. Its totient is φ = 153664.

The previous prime is 155137. The next prime is 155153. The reversal of 155149 is 941551.

155149 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 79524 + 75625 = 282^2 + 275^2 .

It is a 4-Lehmer number, since φ(155149) divides (155149-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 155149 - 2¹⁷ = 24077 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 (155119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 574 + ... + 799.

It is an arithmetic number, because the mean of its divisors is an integer number (39159).

2¹⁵⁵¹⁴⁹ is an apocalyptic number.

It is an amenable number.

155149 is a deficient number, since it is larger than the sum of its proper divisors (1487).

155149 is a wasteful number, since it uses less digits than its factorization.

155149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1486.

The product of its digits is 900, while the sum is 25.

The square root of 155149 is about 393.8895784354. The cubic root of 155149 is about 53.7340605341.

It can be divided in two parts, 1551 and 49, that added together give a square (1600 = 40²).

The spelling of 155149 in words is "one hundred fifty-five thousand, one hundred forty-nine".