764506 has 4 divisors (see below), whose sum is σ = 1146762. Its totient is φ = 382252.

The previous prime is 764501. The next prime is 764521. The reversal of 764506 is 605467.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 605467 = 89 ⋅6803.

It can be written as a sum of positive squares in only one way, i.e., 570025 + 194481 = 755^2 + 441^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (764501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 191125 + ... + 191128.

2⁷⁶⁴⁵⁰⁶ is an apocalyptic number.

764506 is a deficient number, since it is larger than the sum of its proper divisors (382256).

764506 is a wasteful number, since it uses less digits than its factorization.

764506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382255.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 764506 is about 874.3603376183. The cubic root of 764506 is about 91.4380521698.

The spelling of 764506 in words is "seven hundred sixty-four thousand, five hundred six".