156207042 has 40 divisors (see below), whose sum is σ = 351559692. Its totient is φ = 51840000.

The previous prime is 156207041. The next prime is 156207061. The reversal of 156207042 is 240702651.

156207042 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 152250921 + 3956121 = 12339^2 + 1989^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 156206997 and 156207015.

It is not an unprimeable number, because it can be changed into a prime (156207041) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 37042 + ... + 41042.

Almost surely, 2^156207042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 156207042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (175779846).

156207042 is an abundant number, since it is smaller than the sum of its proper divisors (195352650).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

156207042 is a wasteful number, since it uses less digits than its factorization.

156207042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4256 (or 4247 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 156207042 is about 12498.2815618788. The cubic root of 156207042 is about 538.5593078742.

Adding to 156207042 its reverse (240702651), we get a palindrome (396909693).

The spelling of 156207042 in words is "one hundred fifty-six million, two hundred seven thousand, forty-two".