1212868 has 6 divisors (see below), whose sum is σ = 2122526. Its totient is φ = 606432.

The previous prime is 1212857. The next prime is 1212877. The reversal of 1212868 is 8682121.

It can be written as a sum of positive squares in only one way, i.e., 1077444 + 135424 = 1038^2 + 368^2 .

It is an Ulam number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 151605 + ... + 151612.

2^1212868 is an apocalyptic number.

It is an amenable number.

1212868 is a deficient number, since it is larger than the sum of its proper divisors (909658).

1212868 is a wasteful number, since it uses less digits than its factorization.

1212868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303221 (or 303219 counting only the distinct ones).

The product of its digits is 1536, while the sum is 28.

The square root of 1212868 is about 1101.3028647924. The cubic root of 1212868 is about 106.6443486293.

Adding to 1212868 its product of digits (1536), we get a square (1214404 = 1102²).

Adding to 1212868 its reverse (8682121), we get a palindrome (9894989).

It can be divided in two parts, 1212 and 868, that added together give a triangular number (2080 = T₆₄).

The spelling of 1212868 in words is "one million, two hundred twelve thousand, eight hundred sixty-eight".