1573543 has 2 divisors, whose sum is σ = 1573544. Its totient is φ = 1573542.

The previous prime is 1573541. The next prime is 1573547. The reversal of 1573543 is 3453751.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1573543 - 2¹ = 1573541 is a prime.

Together with 1573541, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1573541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 786771 + 786772.

It is an arithmetic number, because the mean of its divisors is an integer number (786772).

2^1573543 is an apocalyptic number.

1573543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1573543 is an equidigital number, since it uses as much as digits as its factorization.

1573543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6300, while the sum is 28.

The square root of 1573543 is about 1254.4094227962. The cubic root of 1573543 is about 116.3124503547.

It can be divided in two parts, 1573 and 543, that added together give a square (2116 = 46²).

The spelling of 1573543 in words is "one million, five hundred seventy-three thousand, five hundred forty-three".