1211994 has 24 divisors (see below), whose sum is σ = 3001440. Its totient is φ = 346248.

The previous prime is 1211983. The next prime is 1211999. The reversal of 1211994 is 4991121.

It is not an unprimeable number, because it can be changed into a prime (1211999) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4684 + ... + 4935.

It is an arithmetic number, because the mean of its divisors is an integer number (125060).

2^1211994 is an apocalyptic number.

1211994 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1211994 is an abundant number, since it is smaller than the sum of its proper divisors (1789446).

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

1211994 is a wasteful number, since it uses less digits than its factorization.

1211994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9634 (or 9631 counting only the distinct ones).

The product of its digits is 648, while the sum is 27.

The square root of 1211994 is about 1100.9059905369. The cubic root of 1211994 is about 106.6187262867.

Subtracting from 1211994 its product of digits (648), we obtain a triangular number (1211346 = T₁₅₅₆).

The spelling of 1211994 in words is "one million, two hundred eleven thousand, nine hundred ninety-four".