742810785 has 16 divisors (see below), whose sum is σ = 1229480640. Its totient is φ = 382504640.

The previous prime is 742810781. The next prime is 742810807. The reversal of 742810785 is 587018247.

It is not a de Polignac number, because 742810785 - 2² = 742810781 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (742810781) 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, 853371 + ... + 854240.

It is an arithmetic number, because the mean of its divisors is an integer number (76842540).

Almost surely, 2^742810785 is an apocalyptic number.

It is an amenable number.

742810785 is a deficient number, since it is larger than the sum of its proper divisors (486669855).

742810785 is a wasteful number, since it uses less digits than its factorization.

742810785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1707648.

The product of its (nonzero) digits is 125440, while the sum is 42.

The square root of 742810785 is about 27254.5553073243. Note that the first 3 decimals coincide. The cubic root of 742810785 is about 905.6479329790.

The spelling of 742810785 in words is "seven hundred forty-two million, eight hundred ten thousand, seven hundred eighty-five".