156385 has 4 divisors (see below), whose sum is σ = 187668. Its totient is φ = 125104.

The previous prime is 156371. The next prime is 156419. The reversal of 156385 is 583651.

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 73441 + 82944 = 271^2 + 288^2 .

It is a cyclic number.

It is not a de Polignac number, because 156385 - 2⁵ = 156353 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15634 + ... + 15643.

It is an arithmetic number, because the mean of its divisors is an integer number (46917).

2¹⁵⁶³⁸⁵ is an apocalyptic number.

It is an amenable number.

156385 is a deficient number, since it is larger than the sum of its proper divisors (31283).

156385 is an equidigital number, since it uses as much as digits as its factorization.

156385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31282.

The product of its digits is 3600, while the sum is 28.

The square root of 156385 is about 395.4554336458. The cubic root of 156385 is about 53.8763747153.

It can be divided in two parts, 15 and 6385, that added together give a square (6400 = 80²).

The spelling of 156385 in words is "one hundred fifty-six thousand, three hundred eighty-five".