1221994 has 16 divisors (see below), whose sum is σ = 1963008. Its totient is φ = 568512.

The previous prime is 1221971. The next prime is 1222003. The reversal of 1221994 is 4991221.

It is a happy 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, 4177 + ... + 4459.

It is an arithmetic number, because the mean of its divisors is an integer number (122688).

2^1221994 is an apocalyptic number.

1221994 is a deficient number, since it is larger than the sum of its proper divisors (741014).

1221994 is a wasteful number, since it uses less digits than its factorization.

1221994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429.

The product of its digits is 1296, while the sum is 28.

The square root of 1221994 is about 1105.4383745827. The cubic root of 1221994 is about 106.9111557619.

It can be divided in two parts, 122 and 1994, that added together give a square (2116 = 46²).

The spelling of 1221994 in words is "one million, two hundred twenty-one thousand, nine hundred ninety-four".