1921318 has 32 divisors (see below), whose sum is σ = 3594240. Its totient is φ = 751680.

The previous prime is 1921307. The next prime is 1921319. The reversal of 1921318 is 8131291.

It is a junction number, because it is equal to n+sod(n) for n = 1921292 and 1921301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1921319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8130 + ... + 8362.

It is an arithmetic number, because the mean of its divisors is an integer number (112320).

2^1921318 is an apocalyptic number.

1921318 is a deficient number, since it is larger than the sum of its proper divisors (1672922).

1921318 is a wasteful number, since it uses less digits than its factorization.

1921318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292.

The product of its digits is 432, while the sum is 25.

The square root of 1921318 is about 1386.1161567488. The cubic root of 1921318 is about 124.3177335417.

The spelling of 1921318 in words is "one million, nine hundred twenty-one thousand, three hundred eighteen".