156399 has 8 divisors (see below), whose sum is σ = 214320. Its totient is φ = 101376.

The previous prime is 156371. The next prime is 156419. The reversal of 156399 is 993651.

156399 is nontrivially palindromic in base 6.

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

It is not a de Polignac number, because 156399 - 2⁹ = 155887 is a prime.

156399 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156319) 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, 594 + ... + 815.

It is an arithmetic number, because the mean of its divisors is an integer number (26790).

2¹⁵⁶³⁹⁹ is an apocalyptic number.

156399 is a deficient number, since it is larger than the sum of its proper divisors (57921).

156399 is a wasteful number, since it uses less digits than its factorization.

156399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1449.

The product of its digits is 7290, while the sum is 33.

The square root of 156399 is about 395.4731343593. The cubic root of 156399 is about 53.8779823860.

It can be divided in two parts, 156 and 399, that added together give a palindrome (555).

The spelling of 156399 in words is "one hundred fifty-six thousand, three hundred ninety-nine".