10390721 has 8 divisors (see below), whose sum is σ = 11373024. Its totient is φ = 9414720.

The previous prime is 10390697. The next prime is 10390727. The reversal of 10390721 is 12709301.

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 10390721 - 2⁶ = 10390657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10390727) 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, 2306 + ... + 5108.

It is an arithmetic number, because the mean of its divisors is an integer number (1421628).

Almost surely, 2^10390721 is an apocalyptic number.

10390721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10390721 is a deficient number, since it is larger than the sum of its proper divisors (982303).

10390721 is a wasteful number, since it uses less digits than its factorization.

10390721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3151.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 10390721 is about 3223.4641304038. The cubic root of 10390721 is about 218.2136404079.

It can be divided in two parts, 10390 and 721, that added together give a palindrome (11111).

The spelling of 10390721 in words is "ten million, three hundred ninety thousand, seven hundred twenty-one".