1212163 has 4 divisors (see below), whose sum is σ = 1235088. Its totient is φ = 1189240.

The previous prime is 1212149. The next prime is 1212173. The reversal of 1212163 is 3612121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1212163 - 2¹³ = 1203971 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

1212163 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1212103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11383 + ... + 11488.

It is an arithmetic number, because the mean of its divisors is an integer number (308772).

2^1212163 is an apocalyptic number.

1212163 is the 589-th centered heptagonal number.

1212163 is a deficient number, since it is larger than the sum of its proper divisors (22925).

1212163 is an equidigital number, since it uses as much as digits as its factorization.

1212163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22924.

The product of its digits is 72, while the sum is 16.

The square root of 1212163 is about 1100.9827428257. The cubic root of 1212163 is about 106.6236816818.

Adding to 1212163 its reverse (3612121), we get a palindrome (4824284).

The spelling of 1212163 in words is "one million, two hundred twelve thousand, one hundred sixty-three".