1221368 has 8 divisors (see below), whose sum is σ = 2290080. Its totient is φ = 610680.

The previous prime is 1221299. The next prime is 1221373. The reversal of 1221368 is 8631221.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76328 + ... + 76343.

It is an arithmetic number, because the mean of its divisors is an integer number (286260).

2^1221368 is an apocalyptic number.

It is an amenable number.

1221368 is a deficient number, since it is larger than the sum of its proper divisors (1068712).

1221368 is a wasteful number, since it uses less digits than its factorization.

1221368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152677 (or 152673 counting only the distinct ones).

The product of its digits is 576, while the sum is 23.

The square root of 1221368 is about 1105.1551927218. The cubic root of 1221368 is about 106.8928965846.

Adding to 1221368 its reverse (8631221), we get a palindrome (9852589).

The spelling of 1221368 in words is "one million, two hundred twenty-one thousand, three hundred sixty-eight".