1142187 has 4 divisors (see below), whose sum is σ = 1522920. Its totient is φ = 761456.

The previous prime is 1142171. The next prime is 1142191. The reversal of 1142187 is 7812411.

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

It is a cyclic number.

It is not a de Polignac number, because 1142187 - 2⁴ = 1142171 is a prime.

It is a super-2 number, since 2×1142187² = 2609182285938, which contains 22 as substring.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (1142287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190362 + ... + 190367.

It is an arithmetic number, because the mean of its divisors is an integer number (380730).

2^1142187 is an apocalyptic number.

1142187 is a deficient number, since it is larger than the sum of its proper divisors (380733).

1142187 is an equidigital number, since it uses as much as digits as its factorization.

1142187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380732.

The product of its digits is 448, while the sum is 24.

The square root of 1142187 is about 1068.7314910678. The cubic root of 1142187 is about 104.5311522395.

Adding to 1142187 its reverse (7812411), we get a palindrome (8954598).

The spelling of 1142187 in words is "one million, one hundred forty-two thousand, one hundred eighty-seven".