1045813 has 4 divisors (see below), whose sum is σ = 1048780. Its totient is φ = 1042848.

The previous prime is 1045801. The next prime is 1045819. The reversal of 1045813 is 3185401.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3185401 = 313 ⋅10177.

It can be written as a sum of positive squares in 2 ways, for example, as 734449 + 311364 = 857^2 + 558^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1045813 is a prime.

It is a Duffinian number.

1045813 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1045819) 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, 870 + ... + 1687.

It is an arithmetic number, because the mean of its divisors is an integer number (262195).

2^1045813 is an apocalyptic number.

It is an amenable number.

1045813 is a deficient number, since it is larger than the sum of its proper divisors (2967).

1045813 is an equidigital number, since it uses as much as digits as its factorization.

1045813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2966.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 1045813 is about 1022.6499889992. The cubic root of 1045813 is about 101.5043556577.

The spelling of 1045813 in words is "one million, forty-five thousand, eight hundred thirteen".