1655543 has 4 divisors (see below), whose sum is σ = 1694088. Its totient is φ = 1617000.

The previous prime is 1655531. The next prime is 1655551. The reversal of 1655543 is 3455561.

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 1655543 - 2¹⁰ = 1654519 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 (1655573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19208 + ... + 19293.

It is an arithmetic number, because the mean of its divisors is an integer number (423522).

2^1655543 is an apocalyptic number.

1655543 is a deficient number, since it is larger than the sum of its proper divisors (38545).

1655543 is an equidigital number, since it uses as much as digits as its factorization.

1655543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38544.

The product of its digits is 9000, while the sum is 29.

The square root of 1655543 is about 1286.6790586623. The cubic root of 1655543 is about 118.2987498400.

The spelling of 1655543 in words is "one million, six hundred fifty-five thousand, five hundred forty-three".