1642743 has 12 divisors (see below), whose sum is σ = 2384200. Its totient is φ = 1089936.

The previous prime is 1642741. The next prime is 1642769. The reversal of 1642743 is 3472461.

It is not a de Polignac number, because 1642743 - 2¹ = 1642741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642741) 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 11 ways as a sum of consecutive naturals, for example, 2880 + ... + 3402.

2^1642743 is an apocalyptic number.

1642743 is a deficient number, since it is larger than the sum of its proper divisors (741457).

1642743 is a wasteful number, since it uses less digits than its factorization.

1642743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878 (or 875 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 1642743 is about 1281.6953616207. The cubic root of 1642743 is about 117.9930810843.

The spelling of 1642743 in words is "one million, six hundred forty-two thousand, seven hundred forty-three".