1321836 has 24 divisors (see below), whose sum is σ = 3138240. Its totient is φ = 432912.

The previous prime is 1321823. The next prime is 1321841. The reversal of 1321836 is 6381231.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226 + ... + 1641.

It is an arithmetic number, because the mean of its divisors is an integer number (130760).

2^1321836 is an apocalyptic number.

It is an amenable number.

1321836 is an abundant number, since it is smaller than the sum of its proper divisors (1816404).

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

1321836 is a wasteful number, since it uses less digits than its factorization.

1321836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1933 (or 1931 counting only the distinct ones).

The product of its digits is 864, while the sum is 24.

The square root of 1321836 is about 1149.7112681017. The cubic root of 1321836 is about 109.7469666020.

The spelling of 1321836 in words is "one million, three hundred twenty-one thousand, eight hundred thirty-six".