156242 has 4 divisors (see below), whose sum is σ = 234366. Its totient is φ = 78120.

The previous prime is 156241. The next prime is 156253. The reversal of 156242 is 242651.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 242651 = 167 ⋅1453.

It can be written as a sum of positive squares in only one way, i.e., 130321 + 25921 = 361^2 + 161^2 .

It is not an unprimeable number, because it can be changed into a prime (156241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39059 + ... + 39062.

156242 is a Friedman number, since it can be written as (5^(6+2-1)-4)*2, using all its digits and the basic arithmetic operations.

2¹⁵⁶²⁴² is an apocalyptic number.

156242 is a deficient number, since it is larger than the sum of its proper divisors (78124).

156242 is an equidigital number, since it uses as much as digits as its factorization.

156242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78123.

The product of its digits is 480, while the sum is 20.

The square root of 156242 is about 395.2745881030. The cubic root of 156242 is about 53.8599480096.

Adding to 156242 its reverse (242651), we get a palindrome (398893).

The spelling of 156242 in words is "one hundred fifty-six thousand, two hundred forty-two".