1303812 has 18 divisors (see below), whose sum is σ = 3295838. Its totient is φ = 434592.

The previous prime is 1303807. The next prime is 1303823. The reversal of 1303812 is 2183031.

It can be written as a sum of positive squares in only one way, i.e., 876096 + 427716 = 936^2 + 654^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18073 + ... + 18144.

2^1303812 is an apocalyptic number.

1303812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1303812 is an abundant number, since it is smaller than the sum of its proper divisors (1992026).

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

1303812 is a wasteful number, since it uses less digits than its factorization.

1303812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36227 (or 36222 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1303812 is about 1141.8458740128. The cubic root of 1303812 is about 109.2458608643.

Adding to 1303812 its reverse (2183031), we get a palindrome (3486843).

The spelling of 1303812 in words is "one million, three hundred three thousand, eight hundred twelve".