781042 has 8 divisors (see below), whose sum is σ = 1191600. Its totient is φ = 383844.

The previous prime is 781021. The next prime is 781043. The reversal of 781042 is 240187.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×781042² = 1220053211528, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (781043) by changing a digit.

781042 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3192 + ... + 3427.

It is an arithmetic number, because the mean of its divisors is an integer number (148950).

2⁷⁸¹⁰⁴² is an apocalyptic number.

781042 is a deficient number, since it is larger than the sum of its proper divisors (410558).

781042 is a wasteful number, since it uses less digits than its factorization.

781042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6680.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 781042 is about 883.7658060821. The cubic root of 781042 is about 92.0926131026.

The spelling of 781042 in words is "seven hundred eighty-one thousand, forty-two".