365543 has 4 divisors (see below), whose sum is σ = 374088. Its totient is φ = 357000.

The previous prime is 365537. The next prime is 365557. The reversal of 365543 is 345563.

365543 is nontrivially palindromic in base 7.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 345563 = 59 ⋅5857.

It is a cyclic number.

It is not a de Polignac number, because 365543 - 2⁴ = 365527 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 (365513) 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, 4208 + ... + 4293.

It is an arithmetic number, because the mean of its divisors is an integer number (93522).

2³⁶⁵⁵⁴³ is an apocalyptic number.

365543 is a deficient number, since it is larger than the sum of its proper divisors (8545).

365543 is an equidigital number, since it uses as much as digits as its factorization.

365543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8544.

The product of its digits is 5400, while the sum is 26.

The square root of 365543 is about 604.6015216653. The cubic root of 365543 is about 71.5011165816.

The spelling of 365543 in words is "three hundred sixty-five thousand, five hundred forty-three".