16010721 has 12 divisors (see below), whose sum is σ = 23167872. Its totient is φ = 10654776.

The previous prime is 16010707. The next prime is 16010741. The reversal of 16010721 is 12701061.

It is not a de Polignac number, because 16010721 - 2⁷ = 16010593 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 16010694 and 16010703.

It is not an unprimeable number, because it can be changed into a prime (16010741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5320 + ... + 7766.

It is an arithmetic number, because the mean of its divisors is an integer number (1930656).

Almost surely, 2^16010721 is an apocalyptic number.

It is an amenable number.

16010721 is a deficient number, since it is larger than the sum of its proper divisors (7157151).

16010721 is a wasteful number, since it uses less digits than its factorization.

16010721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3180 (or 3177 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 18.

The square root of 16010721 is about 4001.3399005833. The cubic root of 16010721 is about 252.0404791361.

Adding to 16010721 its reverse (12701061), we get a palindrome (28711782).

The spelling of 16010721 in words is "sixteen million, ten thousand, seven hundred twenty-one".