1042813 has 4 divisors (see below), whose sum is σ = 1054620. Its totient is φ = 1031008.

The previous prime is 1042799. The next prime is 1042819. The reversal of 1042813 is 3182401.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3182401 = 59 ⋅53939.

It can be written as a sum of positive squares in 2 ways, for example, as 68644 + 974169 = 262^2 + 987^2 .

It is a cyclic number.

It is not a de Polignac number, because 1042813 - 2⁵ = 1042781 is a prime.

It is a Duffinian number.

1042813 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1042819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5770 + ... + 5947.

It is an arithmetic number, because the mean of its divisors is an integer number (263655).

2^1042813 is an apocalyptic number.

It is an amenable number.

1042813 is a deficient number, since it is larger than the sum of its proper divisors (11807).

1042813 is an equidigital number, since it uses as much as digits as its factorization.

1042813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11806.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1042813 is about 1021.1821580893. The cubic root of 1042813 is about 101.4072048588.

The spelling of 1042813 in words is "one million, forty-two thousand, eight hundred thirteen".