1156142 has 16 divisors (see below), whose sum is σ = 1905120. Its totient is φ = 522912.

The previous prime is 1156121. The next prime is 1156151. The reversal of 1156142 is 2416511.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 959 + ... + 1797.

It is an arithmetic number, because the mean of its divisors is an integer number (119070).

2^1156142 is an apocalyptic number.

1156142 is a deficient number, since it is larger than the sum of its proper divisors (748978).

1156142 is a wasteful number, since it uses less digits than its factorization.

1156142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 907.

The product of its digits is 240, while the sum is 20.

The square root of 1156142 is about 1075.2404382277. The cubic root of 1156142 is about 104.9551433491.

The spelling of 1156142 in words is "one million, one hundred fifty-six thousand, one hundred forty-two".