1221996 has 12 divisors (see below), whose sum is σ = 2851352. Its totient is φ = 407328.

The previous prime is 1221971. The next prime is 1222003. The reversal of 1221996 is 6991221.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50905 + ... + 50928.

2^1221996 is an apocalyptic number.

It is an amenable number.

1221996 is an abundant number, since it is smaller than the sum of its proper divisors (1629356).

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

1221996 is a wasteful number, since it uses less digits than its factorization.

1221996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101840 (or 101838 counting only the distinct ones).

The product of its digits is 1944, while the sum is 30.

The square root of 1221996 is about 1105.4392792008. The cubic root of 1221996 is about 106.9112140879.

The spelling of 1221996 in words is "one million, two hundred twenty-one thousand, nine hundred ninety-six".