1213912 has 32 divisors (see below), whose sum is σ = 2656800. Its totient is φ = 509184.

The previous prime is 1213909. The next prime is 1213913. The reversal of 1213912 is 2193121.

It is a plaindrome in base 13.

It is a zygodrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 1213912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2764 + ... + 3172.

It is an arithmetic number, because the mean of its divisors is an integer number (83025).

2^1213912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1213912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1328400).

1213912 is an abundant number, since it is smaller than the sum of its proper divisors (1442888).

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

1213912 is a wasteful number, since it uses less digits than its factorization.

1213912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475 (or 471 counting only the distinct ones).

The product of its digits is 108, while the sum is 19.

The square root of 1213912 is about 1101.7767468957. The cubic root of 1213912 is about 106.6749385946.

It can be divided in two parts, 12 and 13912, that added together give a square (13924 = 118²).

The spelling of 1213912 in words is "one million, two hundred thirteen thousand, nine hundred twelve".