742785 has 16 divisors (see below), whose sum is σ = 1240704. Its totient is φ = 378752.

The previous prime is 742783. The next prime is 742789. The reversal of 742785 is 587247.

It is a cyclic number.

It is not a de Polignac number, because 742785 - 2¹ = 742783 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (742783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 732 + ... + 1421.

It is an arithmetic number, because the mean of its divisors is an integer number (77544).

2⁷⁴²⁷⁸⁵ is an apocalyptic number.

It is an amenable number.

742785 is a deficient number, since it is larger than the sum of its proper divisors (497919).

742785 is a wasteful number, since it uses less digits than its factorization.

742785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2184.

The product of its digits is 15680, while the sum is 33.

The square root of 742785 is about 861.8497548877. The cubic root of 742785 is about 90.5637453683.

The spelling of 742785 in words is "seven hundred forty-two thousand, seven hundred eighty-five".