1022642 has 8 divisors (see below), whose sum is σ = 1539756. Its totient is φ = 509392.

The previous prime is 1022639. The next prime is 1022653. The reversal of 1022642 is 2462201.

It can be written as a sum of positive squares in 2 ways, for example, as 978121 + 44521 = 989^2 + 211^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 1022642.

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, 173 + ... + 1440.

2^1022642 is an apocalyptic number.

1022642 is a deficient number, since it is larger than the sum of its proper divisors (517114).

1022642 is a wasteful number, since it uses less digits than its factorization.

1022642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1932.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1022642 is about 1011.2576328513. The cubic root of 1022642 is about 100.7491076975.

Adding to 1022642 its reverse (2462201), we get a palindrome (3484843).

It can be divided in two parts, 102 and 2642, that added together give a cube (2744 = 14³).

The spelling of 1022642 in words is "one million, twenty-two thousand, six hundred forty-two".