1021742 has 8 divisors (see below), whose sum is σ = 1541136. Its totient is φ = 508032.

The previous prime is 1021711. The next prime is 1021747. The reversal of 1021742 is 2471201.

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 1021742.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021747) 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 3 ways as a sum of consecutive naturals, for example, 938 + ... + 1709.

It is an arithmetic number, because the mean of its divisors is an integer number (192642).

2^1021742 is an apocalyptic number.

1021742 is a deficient number, since it is larger than the sum of its proper divisors (519394).

1021742 is a wasteful number, since it uses less digits than its factorization.

1021742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2842.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 1021742 is about 1010.8125444414. The cubic root of 1021742 is about 100.7195434871.

Adding to 1021742 its reverse (2471201), we get a palindrome (3492943).

The spelling of 1021742 in words is "one million, twenty-one thousand, seven hundred forty-two".