1721545532 has 12 divisors (see below), whose sum is σ = 3443091120. Its totient is φ = 737805216.

The previous prime is 1721545519. The next prime is 1721545541. The reversal of 1721545532 is 2355451271.

1721545532 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 1721545492 and 1721545501.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 30741857 + ... + 30741912.

It is an arithmetic number, because the mean of its divisors is an integer number (286924260).

Almost surely, 2^1721545532 is an apocalyptic number.

It is an amenable number.

1721545532 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1721545532 is a wasteful number, since it uses less digits than its factorization.

1721545532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61483780 (or 61483778 counting only the distinct ones).

The product of its digits is 42000, while the sum is 35.

The square root of 1721545532 is about 41491.5115656203. The cubic root of 1721545532 is about 1198.5040460616.

The spelling of 1721545532 in words is "one billion, seven hundred twenty-one million, five hundred forty-five thousand, five hundred thirty-two".