155385 has 16 divisors (see below), whose sum is σ = 276480. Its totient is φ = 82800.

The previous prime is 155383. The next prime is 155387. The reversal of 155385 is 583551.

It is an interprime number because it is at equal distance from previous prime (155383) and next prime (155387).

It is not a de Polignac number, because 155385 - 2¹ = 155383 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (155381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 441 + ... + 710.

It is an arithmetic number, because the mean of its divisors is an integer number (17280).

2¹⁵⁵³⁸⁵ is an apocalyptic number.

155385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

155385 is a deficient number, since it is larger than the sum of its proper divisors (121095).

155385 is a wasteful number, since it uses less digits than its factorization.

155385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1165 (or 1159 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 155385 is about 394.1890409436. The cubic root of 155385 is about 53.7612920209.

The spelling of 155385 in words is "one hundred fifty-five thousand, three hundred eighty-five".