1020842 has 8 divisors (see below), whose sum is σ = 1545156. Its totient is φ = 505792.

The previous prime is 1020841. The next prime is 1020847. The reversal of 1020842 is 2480201.

It can be written as a sum of positive squares in 2 ways, for example, as 609961 + 410881 = 781^2 + 641^2 .

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 1020842.

It is not an unprimeable number, because it can be changed into a prime (1020841) 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, 2033 + ... + 2484.

2^1020842 is an apocalyptic number.

1020842 is a deficient number, since it is larger than the sum of its proper divisors (524314).

1020842 is a wasteful number, since it uses less digits than its factorization.

1020842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4632.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 1020842 is about 1010.3672599605. The cubic root of 1020842 is about 100.6899619105.

The spelling of 1020842 in words is "one million, twenty thousand, eight hundred forty-two".