1721096 has 48 divisors (see below), whose sum is σ = 3733200. Its totient is φ = 741312.

The previous prime is 1721081. The next prime is 1721123. The reversal of 1721096 is 6901271.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25655 + ... + 25721.

It is an arithmetic number, because the mean of its divisors is an integer number (77775).

2^1721096 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 1721096, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1866600).

1721096 is an abundant number, since it is smaller than the sum of its proper divisors (2012104).

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

1721096 is a wasteful number, since it uses less digits than its factorization.

1721096 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118 (or 101 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 1721096 is about 1311.9054844005. The cubic root of 1721096 is about 119.8399718717.

The spelling of 1721096 in words is "one million, seven hundred twenty-one thousand, ninety-six".