749605 has 4 divisors (see below), whose sum is σ = 899532. Its totient is φ = 599680.

The previous prime is 749587. The next prime is 749641. The reversal of 749605 is 506947.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 506947 = 7 ⋅72421.

It can be written as a sum of positive squares in 2 ways, for example, as 338724 + 410881 = 582^2 + 641^2 .

It is not a de Polignac number, because 749605 - 2⁹ = 749093 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74956 + ... + 74965.

It is an arithmetic number, because the mean of its divisors is an integer number (224883).

2⁷⁴⁹⁶⁰⁵ is an apocalyptic number.

It is an amenable number.

749605 is a deficient number, since it is larger than the sum of its proper divisors (149927).

749605 is a wasteful number, since it uses less digits than its factorization.

749605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149926.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 749605 is about 865.7973203932. The cubic root of 749605 is about 90.8400765599.

The spelling of 749605 in words is "seven hundred forty-nine thousand, six hundred five".