100600721 has 8 divisors (see below), whose sum is σ = 108440640. Its totient is φ = 92775312.

The previous prime is 100600699. The next prime is 100600729. The reversal of 100600721 is 127006001.

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 100600721 - 2⁶ = 100600657 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 100600721.

It is not an unprimeable number, because it can be changed into a prime (100600729) 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, 13970 + ... + 19908.

It is an arithmetic number, because the mean of its divisors is an integer number (13555080).

Almost surely, 2^100600721 is an apocalyptic number.

It is an amenable number.

100600721 is a deficient number, since it is larger than the sum of its proper divisors (7839919).

100600721 is a wasteful number, since it uses less digits than its factorization.

100600721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7255.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 100600721 is about 10029.9910767657. The cubic root of 100600721 is about 465.0864617425.

Adding to 100600721 its reverse (127006001), we get a palindrome (227606722).

The spelling of 100600721 in words is "one hundred million, six hundred thousand, seven hundred twenty-one".