801600721 has 8 divisors (see below), whose sum is σ = 813931200. Its totient is φ = 789299280.

The previous prime is 801600713. The next prime is 801600731. The reversal of 801600721 is 127006108.

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 801600721 - 2³ = 801600713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (801600731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52050 + ... + 65668.

It is an arithmetic number, because the mean of its divisors is an integer number (101741400).

Almost surely, 2^801600721 is an apocalyptic number.

It is an amenable number.

801600721 is a deficient number, since it is larger than the sum of its proper divisors (12330479).

801600721 is a wasteful number, since it uses less digits than its factorization.

801600721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14519.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 801600721 is about 28312.5541235686. The cubic root of 801600721 is about 928.9365116167.

Adding to 801600721 its reverse (127006108), we get a palindrome (928606829).

The spelling of 801600721 in words is "eight hundred one million, six hundred thousand, seven hundred twenty-one".