1721330154 has 12 divisors (see below), whose sum is σ = 3729548706. Its totient is φ = 573776712.

The previous prime is 1721330141. The next prime is 1721330161. The reversal of 1721330154 is 4510331271.

It can be written as a sum of positive squares in only one way, i.e., 1336268025 + 385062129 = 36555^2 + 19623^2 .

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 47814709 + ... + 47814744.

Almost surely, 2^1721330154 is an apocalyptic number.

1721330154 is an abundant number, since it is smaller than the sum of its proper divisors (2008218552).

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

1721330154 is a wasteful number, since it uses less digits than its factorization.

1721330154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95629461 (or 95629458 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 1721330154 is about 41488.9160379010. The cubic root of 1721330154 is about 1198.4540634220.

The spelling of 1721330154 in words is "one billion, seven hundred twenty-one million, three hundred thirty thousand, one hundred fifty-four".