1662743 has 4 divisors (see below), whose sum is σ = 1707720. Its totient is φ = 1617768.

The previous prime is 1662737. The next prime is 1662751. The reversal of 1662743 is 3472661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3472661 = 383 ⋅9067.

It is a cyclic number.

It is not a de Polignac number, because 1662743 - 2⁸ = 1662487 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 (1662733) 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, 22433 + ... + 22506.

It is an arithmetic number, because the mean of its divisors is an integer number (426930).

2^1662743 is an apocalyptic number.

1662743 is a deficient number, since it is larger than the sum of its proper divisors (44977).

1662743 is an equidigital number, since it uses as much as digits as its factorization.

1662743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44976.

The product of its digits is 6048, while the sum is 29.

The square root of 1662743 is about 1289.4739237379. The cubic root of 1662743 is about 118.4699966175.

The spelling of 1662743 in words is "one million, six hundred sixty-two thousand, seven hundred forty-three".