1573 has 6 divisors (see below), whose sum is σ = 1862.
Its totient is φ = 1320.
The previous prime is 1571. The next prime is 1579. The reversal of 1573 is 3751.
It can be divided in two parts, 15 and 73, that added together give a palindrome (88).
It can be written as a sum of positive squares in only one way, i.e., 1089 + 484 = 33^2 + 22^2
It is not a de Polignac number, because 1573 - 21 = 1571 is a prime.
It is a Duffinian number.
Its product of digits (105) is a multiple of the sum of its prime factors (35).
It is a nialpdrome in base 13.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1571) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (5) of ones.
It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 115 + ... + 127.
1573 is a gapful number since it is divisible by the number (13) formed by its first and last digit.
It is an amenable number.
1573 is a deficient number, since it is larger than the sum of its proper divisors (289).
1573 is a wasteful number, since it uses less digits than its factorization.
1573 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 35 (or 24 counting only the distinct ones).
The product of its digits is 105, while the sum is 16.
The square root of 1573 is about 39.6610640301.
The cubic root of 1573 is about 11.6299069738.
The spelling of 1573 in words is "one thousand, five hundred seventy-three".