1721484145 has 8 divisors (see below), whose sum is σ = 2113822656. Its totient is φ = 1345159536.

The previous prime is 1721484143. The next prime is 1721484173. The reversal of 1721484145 is 5414841271.

It is a happy number.

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 1721484145 - 2¹ = 1721484143 is a prime.

It is a super-2 number, since 2×1721484145² = 5927015322972762050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1721484143) 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 7 ways as a sum of consecutive naturals, for example, 4003237 + ... + 4003666.

It is an arithmetic number, because the mean of its divisors is an integer number (264227832).

Almost surely, 2^1721484145 is an apocalyptic number.

It is an amenable number.

1721484145 is a deficient number, since it is larger than the sum of its proper divisors (392338511).

1721484145 is an equidigital number, since it uses as much as digits as its factorization.

1721484145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8006951.

The product of its digits is 35840, while the sum is 37.

The square root of 1721484145 is about 41490.7718053063. The cubic root of 1721484145 is about 1198.4898004432.

The spelling of 1721484145 in words is "one billion, seven hundred twenty-one million, four hundred eighty-four thousand, one hundred forty-five".