1021142 has 8 divisors (see below), whose sum is σ = 1546896. Its totient is φ = 505512.

The previous prime is 1021129. The next prime is 1021157. The reversal of 1021142 is 2411201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2273 + ... + 2684.

It is an arithmetic number, because the mean of its divisors is an integer number (193362).

2^1021142 is an apocalyptic number.

1021142 is a deficient number, since it is larger than the sum of its proper divisors (525754).

1021142 is a wasteful number, since it uses less digits than its factorization.

1021142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5062.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1021142 is about 1010.5157099224. The cubic root of 1021142 is about 100.6998243672.

Adding to 1021142 its reverse (2411201), we get a palindrome (3432343).

The spelling of 1021142 in words is "one million, twenty-one thousand, one hundred forty-two".