775213 has 4 divisors (see below), whose sum is σ = 779868. Its totient is φ = 770560.

The previous prime is 775193. The next prime is 775237. The reversal of 775213 is 312577.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 312577 = 241 ⋅1297.

It can be written as a sum of positive squares in 2 ways, for example, as 660969 + 114244 = 813^2 + 338^2 .

It is a cyclic number.

It is not a de Polignac number, because 775213 - 2¹⁷ = 644141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (775273) 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 in 3 ways as a sum of consecutive naturals, for example, 2068 + ... + 2413.

It is an arithmetic number, because the mean of its divisors is an integer number (194967).

2⁷⁷⁵²¹³ is an apocalyptic number.

It is an amenable number.

775213 is a deficient number, since it is larger than the sum of its proper divisors (4655).

775213 is a wasteful number, since it uses less digits than its factorization.

775213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4654.

The product of its digits is 1470, while the sum is 25.

The square root of 775213 is about 880.4618106426. The cubic root of 775213 is about 91.8629417898.

The spelling of 775213 in words is "seven hundred seventy-five thousand, two hundred thirteen".