1001142 has 12 divisors (see below), whose sum is σ = 2169180. Its totient is φ = 333708.

The previous prime is 1001123. The next prime is 1001153. The reversal of 1001142 is 2411001.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27792 + ... + 27827.

It is an arithmetic number, because the mean of its divisors is an integer number (180765).

2^1001142 is an apocalyptic number.

1001142 is an abundant number, since it is smaller than the sum of its proper divisors (1168038).

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

1001142 is a wasteful number, since it uses less digits than its factorization.

1001142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55627 (or 55624 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 1001142 is about 1000.5708370725. The cubic root of 1001142 is about 100.0380521851.

Adding to 1001142 its reverse (2411001), we get a palindrome (3412143).

The spelling of 1001142 in words is "one million, one thousand, one hundred forty-two".