1022142 has 32 divisors (see below), whose sum is σ = 2363904. Its totient is φ = 291200.

The previous prime is 1022141. The next prime is 1022167. The reversal of 1022142 is 2412201.

1022142 is nontrivially palindromic in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 667 + ... + 1577.

It is an arithmetic number, because the mean of its divisors is an integer number (73872).

2^1022142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1022142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1181952).

1022142 is an abundant number, since it is smaller than the sum of its proper divisors (1341762).

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

1022142 is a wasteful number, since it uses less digits than its factorization.

1022142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 944.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 1022142 is about 1011.0103857033. The cubic root of 1022142 is about 100.7326852786.

Adding to 1022142 its reverse (2412201), we get a palindrome (3434343).

The spelling of 1022142 in words is "one million, twenty-two thousand, one hundred forty-two".