1213388 has 36 divisors (see below), whose sum is σ = 2457840. Its totient is φ = 522720.

The previous prime is 1213379. The next prime is 1213427. The reversal of 1213388 is 8833121.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11078 + ... + 11186.

2^1213388 is an apocalyptic number.

It is an amenable number.

1213388 is an abundant number, since it is smaller than the sum of its proper divisors (1244452).

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

1213388 is a wasteful number, since it uses less digits than its factorization.

1213388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158 (or 145 counting only the distinct ones).

The product of its digits is 1152, while the sum is 26.

The square root of 1213388 is about 1101.5389235066. The cubic root of 1213388 is about 106.6595872038.

It can be divided in two parts, 12133 and 88, that added together give a palindrome (12221).

The spelling of 1213388 in words is "one million, two hundred thirteen thousand, three hundred eighty-eight".