7156042 has 4 divisors (see below), whose sum is σ = 10734066. Its totient is φ = 3578020.

The previous prime is 7156033. The next prime is 7156043. The reversal of 7156042 is 2406517.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 4124961 + 3031081 = 2031^2 + 1741^2 .

It is a junction number, because it is equal to n+sod(n) for n = 7155998 and 7156016.

It is not an unprimeable number, because it can be changed into a prime (7156043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1789009 + ... + 1789012.

Almost surely, 2^7156042 is an apocalyptic number.

7156042 is a deficient number, since it is larger than the sum of its proper divisors (3578024).

7156042 is a wasteful number, since it uses less digits than its factorization.

7156042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3578023.

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

The square root of 7156042 is about 2675.0779427897. The cubic root of 7156042 is about 192.7041024040.

The spelling of 7156042 in words is "seven million, one hundred fifty-six thousand, forty-two".