1721152 has 14 divisors (see below), whose sum is σ = 3415538. Its totient is φ = 860544.

The previous prime is 1721149. The next prime is 1721183. The reversal of 1721152 is 2511271.

It can be written as a sum of positive squares in only one way, i.e., 1700416 + 20736 = 1304^2 + 144^2 .

It is a congruent number.

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 as a sum of consecutive naturals, namely, 13383 + ... + 13510.

It is an arithmetic number, because the mean of its divisors is an integer number (243967).

2^1721152 is an apocalyptic number.

It is an amenable number.

1721152 is a deficient number, since it is larger than the sum of its proper divisors (1694386).

1721152 is an equidigital number, since it uses as much as digits as its factorization.

1721152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26905 (or 26895 counting only the distinct ones).

The product of its digits is 140, while the sum is 19.

The square root of 1721152 is about 1311.9268272278. The cubic root of 1721152 is about 119.8412716182.

The spelling of 1721152 in words is "one million, seven hundred twenty-one thousand, one hundred fifty-two".