10170721 has 8 divisors (see below), whose sum is σ = 11124864. Its totient is φ = 9221520.

The previous prime is 10170707. The next prime is 10170731. The reversal of 10170721 is 12707101.

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

It is not a de Polignac number, because 10170721 - 2⁷ = 10170593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10170701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4095 + ... + 6091.

It is an arithmetic number, because the mean of its divisors is an integer number (1390608).

Almost surely, 2^10170721 is an apocalyptic number.

10170721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10170721 is a deficient number, since it is larger than the sum of its proper divisors (954143).

10170721 is a wasteful number, since it uses less digits than its factorization.

10170721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2471.

The product of its (nonzero) digits is 98, while the sum is 19.

The square root of 10170721 is about 3189.1567851079. The cubic root of 10170721 is about 216.6625816455.

Adding to 10170721 its reverse (12707101), we get a palindrome (22877822).

The spelling of 10170721 in words is "ten million, one hundred seventy thousand, seven hundred twenty-one".