743605 has 4 divisors (see below), whose sum is σ = 892332. Its totient is φ = 594880.

The previous prime is 743591. The next prime is 743609. The reversal of 743605 is 506347.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 139876 + 603729 = 374^2 + 777^2 .

It is not a de Polignac number, because 743605 - 2⁵ = 743573 is a prime.

It is a d-powerful number, because it can be written as 7⁶ + 4⁷ + 6 + 3¹² + 0 + 5⁷ .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 743605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (743609) 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 3 ways as a sum of consecutive naturals, for example, 74356 + ... + 74365.

It is an arithmetic number, because the mean of its divisors is an integer number (223083).

2⁷⁴³⁶⁰⁵ is an apocalyptic number.

It is an amenable number.

743605 is a deficient number, since it is larger than the sum of its proper divisors (148727).

743605 is a wasteful number, since it uses less digits than its factorization.

743605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148726.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 743605 is about 862.3253446351. The cubic root of 743605 is about 90.5970591628.

The spelling of 743605 in words is "seven hundred forty-three thousand, six hundred five".