156081 has 4 divisors (see below), whose sum is σ = 208112. Its totient is φ = 104052.

The previous prime is 156071. The next prime is 156089. The reversal of 156081 is 180651.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 180651 = 3 ⋅60217.

It is not a de Polignac number, because 156081 - 2⁹ = 155569 is a prime.

It is a super-2 number, since 2×156081² = 48722557122, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (156089) 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, 26011 + ... + 26016.

It is an arithmetic number, because the mean of its divisors is an integer number (52028).

2¹⁵⁶⁰⁸¹ is an apocalyptic number.

It is an amenable number.

156081 is a deficient number, since it is larger than the sum of its proper divisors (52031).

156081 is an equidigital number, since it uses as much as digits as its factorization.

156081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52030.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 156081 is about 395.0708797165. The cubic root of 156081 is about 53.8414416075.

The spelling of 156081 in words is "one hundred fifty-six thousand, eighty-one".