1921736 has 32 divisors (see below), whose sum is σ = 3888000. Its totient is φ = 887616.

The previous prime is 1921729. The next prime is 1921739. The reversal of 1921736 is 6371291.

It is a junction number, because it is equal to n+sod(n) for n = 1921699 and 1921708.

It is not an unprimeable number, because it can be changed into a prime (1921739) 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, 7010 + ... + 7278.

It is an arithmetic number, because the mean of its divisors is an integer number (121500).

2^1921736 is an apocalyptic number.

It is an amenable number.

1921736 is an abundant number, since it is smaller than the sum of its proper divisors (1966264).

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

1921736 is a wasteful number, since it uses less digits than its factorization.

1921736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341 (or 337 counting only the distinct ones).

The product of its digits is 2268, while the sum is 29.

The square root of 1921736 is about 1386.2669295630. The cubic root of 1921736 is about 124.3267483681.

The spelling of 1921736 in words is "one million, nine hundred twenty-one thousand, seven hundred thirty-six".