1213924 has 12 divisors (see below), whose sum is σ = 2139004. Its totient is φ = 602784.

The previous prime is 1213921. The next prime is 1213931. The reversal of 1213924 is 4293121.

It can be written as a sum of positive squares in 2 ways, for example, as 589824 + 624100 = 768^2 + 790^2 .

It is a super-2 number, since 2×1213924² = 2947222955552, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1213895 and 1213904.

It is not an unprimeable number, because it can be changed into a prime (1213921) 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, 339 + ... + 1594.

2^1213924 is an apocalyptic number.

It is an amenable number.

1213924 is a deficient number, since it is larger than the sum of its proper divisors (925080).

1213924 is a wasteful number, since it uses less digits than its factorization.

1213924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2094 (or 2092 counting only the distinct ones).

The product of its digits is 432, while the sum is 22.

The square root of 1213924 is about 1101.7821926316. The cubic root of 1213924 is about 106.6752901014.

The spelling of 1213924 in words is "one million, two hundred thirteen thousand, nine hundred twenty-four".