156742 has 8 divisors (see below), whose sum is σ = 237600. Its totient is φ = 77544.

The previous prime is 156733. The next prime is 156749. The reversal of 156742 is 247651.

156742 is an esthetic number in base 4, because in such base its adjacent digits differ by 1.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156749) 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 in 3 ways as a sum of consecutive naturals, for example, 142 + ... + 577.

It is an arithmetic number, because the mean of its divisors is an integer number (29700).

156742 is a Friedman number, since it can be written as (41*6+5^7)*2, using all its digits and the basic arithmetic operations.

2¹⁵⁶⁷⁴² is an apocalyptic number.

156742 is a deficient number, since it is larger than the sum of its proper divisors (80858).

156742 is a wasteful number, since it uses less digits than its factorization.

156742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830.

The product of its digits is 1680, while the sum is 25.

The square root of 156742 is about 395.9065546313. The cubic root of 156742 is about 53.9173403843.

Subtracting 156742 from its reverse (247651), we obtain a palindrome (90909).

It can be divided in two parts, 156 and 742, that added together give a palindrome (898).

The spelling of 156742 in words is "one hundred fifty-six thousand, seven hundred forty-two".