742543 has 8 divisors (see below), whose sum is σ = 812160. Its totient is φ = 675840.

The previous prime is 742541. The next prime is 742549. The reversal of 742543 is 345247.

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 742543 - 2¹ = 742541 is a prime.

It is a Duffinian number.

742543 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (742541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178 + ... + 1231.

It is an arithmetic number, because the mean of its divisors is an integer number (101520).

2⁷⁴²⁵⁴³ is an apocalyptic number.

742543 is a deficient number, since it is larger than the sum of its proper divisors (69617).

742543 is a wasteful number, since it uses less digits than its factorization.

742543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1457.

The product of its digits is 3360, while the sum is 25.

The square root of 742543 is about 861.7093477502. The cubic root of 742543 is about 90.5539090510.

The spelling of 742543 in words is "seven hundred forty-two thousand, five hundred forty-three".