1662543 has 6 divisors (see below), whose sum is σ = 2401464. Its totient is φ = 1108356.

The previous prime is 1662527. The next prime is 1662547. The reversal of 1662543 is 3452661.

It is not a de Polignac number, because 1662543 - 2⁴ = 1662527 is a prime.

It is a d-powerful number, because it can be written as 1 + 6 + 6⁶ + 2¹¹ + 5⁵ + 4⁷ + 3¹³ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1662547) 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 5 ways as a sum of consecutive naturals, for example, 92355 + ... + 92372.

It is an arithmetic number, because the mean of its divisors is an integer number (400244).

2^1662543 is an apocalyptic number.

1662543 is a deficient number, since it is larger than the sum of its proper divisors (738921).

1662543 is a wasteful number, since it uses less digits than its factorization.

1662543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184733 (or 184730 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 1662543 is about 1289.3963703997. The cubic root of 1662543 is about 118.4652464447.

The spelling of 1662543 in words is "one million, six hundred sixty-two thousand, five hundred forty-three".