740785 has 4 divisors (see below), whose sum is σ = 888948. Its totient is φ = 592624.

The previous prime is 740749. The next prime is 740801. The reversal of 740785 is 587047.

It is a happy number.

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 431649 + 309136 = 657^2 + 556^2 .

It is a cyclic number.

It is not a de Polignac number, because 740785 - 2¹⁵ = 708017 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 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, 74074 + ... + 74083.

It is an arithmetic number, because the mean of its divisors is an integer number (222237).

2⁷⁴⁰⁷⁸⁵ is an apocalyptic number.

It is an amenable number.

740785 is a deficient number, since it is larger than the sum of its proper divisors (148163).

740785 is a wasteful number, since it uses less digits than its factorization.

740785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148162.

The product of its (nonzero) digits is 7840, while the sum is 31.

The square root of 740785 is about 860.6886777459. The cubic root of 740785 is about 90.4823892556.

The spelling of 740785 in words is "seven hundred forty thousand, seven hundred eighty-five".