765742 has 4 divisors (see below), whose sum is σ = 1148616. Its totient is φ = 382870.

The previous prime is 765727. The next prime is 765749. The reversal of 765742 is 247567.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 247567 = 37 ⋅6691.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (765749) by changing a digit.

765742 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 as a sum of consecutive naturals, namely, 191434 + ... + 191437.

It is an arithmetic number, because the mean of its divisors is an integer number (287154).

2⁷⁶⁵⁷⁴² is an apocalyptic number.

765742 is a deficient number, since it is larger than the sum of its proper divisors (382874).

765742 is a wasteful number, since it uses less digits than its factorization.

765742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382873.

The product of its digits is 11760, while the sum is 31.

The square root of 765742 is about 875.0668545888. The cubic root of 765742 is about 91.4873025270.

The spelling of 765742 in words is "seven hundred sixty-five thousand, seven hundred forty-two".