1020042343 has 4 divisors (see below), whose sum is σ = 1020388648. Its totient is φ = 1019696040.

The previous prime is 1020042337. The next prime is 1020042349. The reversal of 1020042343 is 3432400201.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1020042337) and next prime (1020042349).

It is a cyclic number.

It is not a de Polignac number, because 1020042343 - 2⁵ = 1020042311 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1020042343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020042349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168696 + ... + 174637.

It is an arithmetic number, because the mean of its divisors is an integer number (255097162).

Almost surely, 2^1020042343 is an apocalyptic number.

1020042343 is a deficient number, since it is larger than the sum of its proper divisors (346305).

1020042343 is an equidigital number, since it uses as much as digits as its factorization.

1020042343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346304.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 1020042343 is about 31938.1017438419. The cubic root of 1020042343 is about 1006.6366385914.

Adding to 1020042343 its reverse (3432400201), we get a palindrome (4452442544).

The spelling of 1020042343 in words is "one billion, twenty million, forty-two thousand, three hundred forty-three".