1663212 has 48 divisors (see below), whose sum is σ = 4257792. Its totient is φ = 503040.

The previous prime is 1663183. The next prime is 1663217. The reversal of 1663212 is 2123661.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1663217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6193 + ... + 6455.

It is an arithmetic number, because the mean of its divisors is an integer number (88704).

2^1663212 is an apocalyptic number.

1663212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1663212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2128896).

1663212 is an abundant number, since it is smaller than the sum of its proper divisors (2594580).

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

1663212 is a wasteful number, since it uses less digits than its factorization.

1663212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318 (or 316 counting only the distinct ones).

The product of its digits is 432, while the sum is 21.

The square root of 1663212 is about 1289.6557680249. The cubic root of 1663212 is about 118.4811342788.

Adding to 1663212 its reverse (2123661), we get a palindrome (3786873).

The spelling of 1663212 in words is "one million, six hundred sixty-three thousand, two hundred twelve".