742471785 has 64 divisors (see below), whose sum is σ = 1478972160. Its totient is φ = 350231040.

The previous prime is 742471777. The next prime is 742471789. The reversal of 742471785 is 587174247.

It is not a de Polignac number, because 742471785 - 2³ = 742471777 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 742471785.

It is not an unprimeable number, because it can be changed into a prime (742471789) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 48189 + ... + 61701.

It is an arithmetic number, because the mean of its divisors is an integer number (23108940).

Almost surely, 2^742471785 is an apocalyptic number.

It is an amenable number.

742471785 is a deficient number, since it is larger than the sum of its proper divisors (736500375).

742471785 is a wasteful number, since it uses less digits than its factorization.

742471785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13575 (or 13569 counting only the distinct ones).

The product of its digits is 439040, while the sum is 45.

The square root of 742471785 is about 27248.3354537484. The cubic root of 742471785 is about 905.5101404340.

The spelling of 742471785 in words is "seven hundred forty-two million, four hundred seventy-one thousand, seven hundred eighty-five".