1642543 has 8 divisors (see below), whose sum is σ = 1884960. Its totient is φ = 1402080.

The previous prime is 1642519. The next prime is 1642549. The reversal of 1642543 is 3452461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1642543 - 2⁹ = 1642031 is a prime.

1642543 is a lucky number.

It is a zygodrome in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2973 + ... + 3481.

It is an arithmetic number, because the mean of its divisors is an integer number (235620).

2^1642543 is an apocalyptic number.

1642543 is a deficient number, since it is larger than the sum of its proper divisors (242417).

1642543 is an equidigital number, since it uses as much as digits as its factorization.

1642543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 977.

The product of its digits is 2880, while the sum is 25.

The square root of 1642543 is about 1281.6173375856. The cubic root of 1642543 is about 117.9882924322.

The spelling of 1642543 in words is "one million, six hundred forty-two thousand, five hundred forty-three".