1642043 has 4 divisors (see below), whose sum is σ = 1768368. Its totient is φ = 1515720.

The previous prime is 1642033. The next prime is 1642049. The reversal of 1642043 is 3402461.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1642043 - 2¹⁶ = 1576507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1642049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63143 + ... + 63168.

It is an arithmetic number, because the mean of its divisors is an integer number (442092).

2^1642043 is an apocalyptic number.

1642043 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1642043 is a deficient number, since it is larger than the sum of its proper divisors (126325).

1642043 is a wasteful number, since it uses less digits than its factorization.

1642043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126324.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1642043 is about 1281.4222567132. The cubic root of 1642043 is about 117.9763191012.

The spelling of 1642043 in words is "one million, six hundred forty-two thousand, forty-three".