1321912 has 16 divisors (see below), whose sum is σ = 2490840. Its totient is φ = 657696.

The previous prime is 1321897. The next prime is 1321919. The reversal of 1321912 is 2191231.

It is a self number, because there is not a number n which added to its sum of digits gives 1321912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321919) 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, 2763 + ... + 3205.

2^1321912 is an apocalyptic number.

It is an amenable number.

1321912 is a deficient number, since it is larger than the sum of its proper divisors (1168928).

1321912 is a wasteful number, since it uses less digits than its factorization.

1321912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822 (or 818 counting only the distinct ones).

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

The square root of 1321912 is about 1149.7443194032. The cubic root of 1321912 is about 109.7490698911.

Multiplying 1321912 by its sum of digits (19), we get a triangular number (25116328 = T₇₀₈₇).

It can be divided in two parts, 13219 and 12, that added together give a palindrome (13231).

The spelling of 1321912 in words is "one million, three hundred twenty-one thousand, nine hundred twelve".