1282813 has 4 divisors (see below), whose sum is σ = 1466080. Its totient is φ = 1099548.

The previous prime is 1282807. The next prime is 1282817. The reversal of 1282813 is 3182821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3182821 = 1597 ⋅1993.

It is a cyclic number.

It is not a de Polignac number, because 1282813 - 2⁵ = 1282781 is a prime.

It is a super-3 number, since 3×1282813³ = 6333026596980425391, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1282817) 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 3 ways as a sum of consecutive naturals, for example, 91623 + ... + 91636.

It is an arithmetic number, because the mean of its divisors is an integer number (366520).

2^1282813 is an apocalyptic number.

It is an amenable number.

1282813 is a deficient number, since it is larger than the sum of its proper divisors (183267).

1282813 is an equidigital number, since it uses as much as digits as its factorization.

1282813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183266.

The product of its digits is 768, while the sum is 25.

The square root of 1282813 is about 1132.6133497359. The cubic root of 1282813 is about 108.6561845602.

The spelling of 1282813 in words is "one million, two hundred eighty-two thousand, eight hundred thirteen".