764042 has 4 divisors (see below), whose sum is σ = 1146066. Its totient is φ = 382020.

The previous prime is 764041. The next prime is 764051. The reversal of 764042 is 240467.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 240467 = 31 ⋅7757.

It can be written as a sum of positive squares in only one way, i.e., 654481 + 109561 = 809^2 + 331^2 .

It is a junction number, because it is equal to n+sod(n) for n = 763999 and 764017.

It is not an unprimeable number, because it can be changed into a prime (764041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 191009 + ... + 191012.

2⁷⁶⁴⁰⁴² is an apocalyptic number.

764042 is a deficient number, since it is larger than the sum of its proper divisors (382024).

764042 is a wasteful number, since it uses less digits than its factorization.

764042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382023.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 764042 is about 874.0949605163. The cubic root of 764042 is about 91.4195496585.

The spelling of 764042 in words is "seven hundred sixty-four thousand, forty-two".