1217868 has 12 divisors (see below), whose sum is σ = 2841720. Its totient is φ = 405952.

The previous prime is 1217861. The next prime is 1217893. The reversal of 1217868 is 8687121.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (1217861) 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, 50733 + ... + 50756.

It is an arithmetic number, because the mean of its divisors is an integer number (236810).

2^1217868 is an apocalyptic number.

It is an amenable number.

1217868 is an abundant number, since it is smaller than the sum of its proper divisors (1623852).

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

1217868 is a wasteful number, since it uses less digits than its factorization.

1217868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101496 (or 101494 counting only the distinct ones).

The product of its digits is 5376, while the sum is 33.

The square root of 1217868 is about 1103.5705686543. The cubic root of 1217868 is about 106.7906934055.

It can be divided in two parts, 12178 and 68, that added together give a triangular number (12246 = T₁₅₆).

The spelling of 1217868 in words is "one million, two hundred seventeen thousand, eight hundred sixty-eight".