813258 has 12 divisors (see below), whose sum is σ = 1762098. Its totient is φ = 271080.

The previous prime is 813251. The next prime is 813269. The reversal of 813258 is 852318.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 804609 + 8649 = 897^2 + 93^2 .

It is a super-2 number, since 2×813258² = 1322777149128, which contains 22 as substring.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 813258.

It is not an unprimeable number, because it can be changed into a prime (813251) by changing a digit.

813258 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22573 + ... + 22608.

2⁸¹³²⁵⁸ is an apocalyptic number.

813258 is an abundant number, since it is smaller than the sum of its proper divisors (948840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

813258 is a wasteful number, since it uses less digits than its factorization.

813258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45189 (or 45186 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 813258 is about 901.8081835956. The cubic root of 813258 is about 93.3417877829.

Subtracting 813258 from its reverse (852318), we obtain a triangular number (39060 = T₂₇₉).

The spelling of 813258 in words is "eight hundred thirteen thousand, two hundred fifty-eight".