1921356 has 54 divisors (see below), whose sum is σ = 5210660. Its totient is φ = 595296.

The previous prime is 1921327. The next prime is 1921363. The reversal of 1921356 is 6531291.

Its product of digits (1620) is a multiple of the sum of its prime factors (135).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 36226 + ... + 36278.

2^1921356 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 1921356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2605330).

1921356 is an abundant number, since it is smaller than the sum of its proper divisors (3289304).

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

1921356 is a wasteful number, since it uses less digits than its factorization.

1921356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135 (or 77 counting only the distinct ones).

The product of its digits is 1620, while the sum is 27.

The square root of 1921356 is about 1386.1298640459. The cubic root of 1921356 is about 124.3185531254.

The spelling of 1921356 in words is "one million, nine hundred twenty-one thousand, three hundred fifty-six".