817012742 has 16 divisors (see below), whose sum is σ = 1508331552. Its totient is φ = 323213760.

The previous prime is 817012733. The next prime is 817012747. The reversal of 817012742 is 247210718.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 817012699 and 817012708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (817012747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2244359 + ... + 2244722.

It is an arithmetic number, because the mean of its divisors is an integer number (94270722).

Almost surely, 2^817012742 is an apocalyptic number.

817012742 is a deficient number, since it is larger than the sum of its proper divisors (691318810).

817012742 is a wasteful number, since it uses less digits than its factorization.

817012742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4489103.

The product of its (nonzero) digits is 6272, while the sum is 32.

The square root of 817012742 is about 28583.4347481194. The cubic root of 817012742 is about 934.8521760068.

The spelling of 817012742 in words is "eight hundred seventeen million, twelve thousand, seven hundred forty-two".