1211984 has 20 divisors (see below), whose sum is σ = 2365920. Its totient is φ = 601440.

The previous prime is 1211983. The next prime is 1211999. The reversal of 1211984 is 4891121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3197 + ... + 3555.

It is an arithmetic number, because the mean of its divisors is an integer number (118296).

2^1211984 is an apocalyptic number.

It is an amenable number.

1211984 is a deficient number, since it is larger than the sum of its proper divisors (1153936).

1211984 is a wasteful number, since it uses less digits than its factorization.

1211984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578 (or 572 counting only the distinct ones).

The product of its digits is 576, while the sum is 26.

The square root of 1211984 is about 1100.9014488137. The cubic root of 1211984 is about 106.6184330536.

The spelling of 1211984 in words is "one million, two hundred eleven thousand, nine hundred eighty-four".