1021728341 has 8 divisors (see below), whose sum is σ = 1032086880. Its totient is φ = 1011385008.

The previous prime is 1021728317. The next prime is 1021728353. The reversal of 1021728341 is 1438271201.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021728341 is a prime.

It is a super-2 number, since 2×1021728341² = 2087857605605224562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021728371) 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, 171155 + ... + 177023.

It is an arithmetic number, because the mean of its divisors is an integer number (129010860).

Almost surely, 2^1021728341 is an apocalyptic number.

It is an amenable number.

1021728341 is a deficient number, since it is larger than the sum of its proper divisors (10358539).

1021728341 is a wasteful number, since it uses less digits than its factorization.

1021728341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7603.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 1021728341 is about 31964.4856207636. The cubic root of 1021728341 is about 1007.1909466720.

Adding to 1021728341 its reverse (1438271201), we get a palindrome (2459999542).

The spelling of 1021728341 in words is "one billion, twenty-one million, seven hundred twenty-eight thousand, three hundred forty-one".