813045 has 16 divisors (see below), whose sum is σ = 1321920. Its totient is φ = 426624.

The previous prime is 813041. The next prime is 813049. The reversal of 813045 is 540318.

It is an interprime number because it is at equal distance from previous prime (813041) and next prime (813049).

It is not a de Polignac number, because 813045 - 2² = 813041 is a prime.

It is a super-2 number, since 2×813045² = 1322084344050, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813041) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 601 + ... + 1409.

It is an arithmetic number, because the mean of its divisors is an integer number (82620).

2⁸¹³⁰⁴⁵ is an apocalyptic number.

It is an amenable number.

813045 is a deficient number, since it is larger than the sum of its proper divisors (508875).

813045 is a wasteful number, since it uses less digits than its factorization.

813045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 813045 is about 901.6900797946. The cubic root of 813045 is about 93.3336380376. Note that the first 3 decimals are identical.

The spelling of 813045 in words is "eight hundred thirteen thousand, forty-five".