155397 has 16 divisors (see below), whose sum is σ = 240192. Its totient is φ = 88320.

The previous prime is 155387. The next prime is 155399. The reversal of 155397 is 793551.

It is a happy number.

155397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 155397 - 2⁴ = 155381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155399) 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, 423 + ... + 699.

It is an arithmetic number, because the mean of its divisors is an integer number (15012).

2¹⁵⁵³⁹⁷ is an apocalyptic number.

155397 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

155397 is a deficient number, since it is larger than the sum of its proper divisors (84795).

155397 is a wasteful number, since it uses less digits than its factorization.

155397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308.

The product of its digits is 4725, while the sum is 30.

The square root of 155397 is about 394.2042617730. The cubic root of 155397 is about 53.7626759359.

The spelling of 155397 in words is "one hundred fifty-five thousand, three hundred ninety-seven".