1321994 has 16 divisors (see below), whose sum is σ = 2142720. Its totient is φ = 609840.

The previous prime is 1321981. The next prime is 1321997. The reversal of 1321994 is 4991231.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is an Ulam number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1321997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 839 + ... + 1829.

It is an arithmetic number, because the mean of its divisors is an integer number (133920).

2^1321994 is an apocalyptic number.

1321994 is a deficient number, since it is larger than the sum of its proper divisors (820726).

1321994 is a wasteful number, since it uses less digits than its factorization.

1321994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1045.

The product of its digits is 1944, while the sum is 29.

The square root of 1321994 is about 1149.7799789525. The cubic root of 1321994 is about 109.7513391389.

The spelling of 1321994 in words is "one million, three hundred twenty-one thousand, nine hundred ninety-four".