1721132701 has 4 divisors (see below), whose sum is σ = 1721241504. Its totient is φ = 1721023900.

The previous prime is 1721132681. The next prime is 1721132713. The reversal of 1721132701 is 1072311271.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1721132701 - 2⁵ = 1721132669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1721132761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25585 + ... + 64006.

It is an arithmetic number, because the mean of its divisors is an integer number (430310376).

Almost surely, 2^1721132701 is an apocalyptic number.

It is an amenable number.

1721132701 is a deficient number, since it is larger than the sum of its proper divisors (108803).

1721132701 is an equidigital number, since it uses as much as digits as its factorization.

1721132701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108802.

The product of its (nonzero) digits is 588, while the sum is 25.

The square root of 1721132701 is about 41486.5363823012. The cubic root of 1721132701 is about 1198.4082369626.

Adding to 1721132701 its reverse (1072311271), we get a palindrome (2793443972).

The spelling of 1721132701 in words is "one billion, seven hundred twenty-one million, one hundred thirty-two thousand, seven hundred one".