1721744461 has 8 divisors (see below), whose sum is σ = 1736244224. Its totient is φ = 1707259680.

The previous prime is 1721744443. The next prime is 1721744503. The reversal of 1721744461 is 1644471271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1721744461 - 2²⁵ = 1688190029 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1721744461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1721744161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 464626 + ... + 468316.

It is an arithmetic number, because the mean of its divisors is an integer number (217030528).

Almost surely, 2^1721744461 is an apocalyptic number.

It is an amenable number.

1721744461 is a deficient number, since it is larger than the sum of its proper divisors (14499763).

1721744461 is a wasteful number, since it uses less digits than its factorization.

1721744461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7491.

The product of its digits is 37632, while the sum is 37.

The square root of 1721744461 is about 41493.9087216425. The cubic root of 1721744461 is about 1198.5502076888.

The spelling of 1721744461 in words is "one billion, seven hundred twenty-one million, seven hundred forty-four thousand, four hundred sixty-one".