1921734 has 24 divisors (see below), whose sum is σ = 4190472. Its totient is φ = 636480.

The previous prime is 1921729. The next prime is 1921739. The reversal of 1921734 is 4371291.

It is an interprime number because it is at equal distance from previous prime (1921729) and next prime (1921739).

It is a junction number, because it is equal to n+sod(n) for n = 1921698 and 1921707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1921739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4117 + ... + 4559.

It is an arithmetic number, because the mean of its divisors is an integer number (174603).

2^1921734 is an apocalyptic number.

1921734 is an abundant number, since it is smaller than the sum of its proper divisors (2268738).

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

1921734 is a wasteful number, since it uses less digits than its factorization.

1921734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 692 (or 689 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 1921734 is about 1386.2662082010. The cubic root of 1921734 is about 124.3267052380.

The spelling of 1921734 in words is "one million, nine hundred twenty-one thousand, seven hundred thirty-four".