10070721 has 6 divisors (see below), whose sum is σ = 14546610. Its totient is φ = 6713808.

The previous prime is 10070701. The next prime is 10070791. The reversal of 10070721 is 12707001.

It can be written as a sum of positive squares in only one way, i.e., 6969600 + 3101121 = 2640^2 + 1761^2 .

It is not a de Polignac number, because 10070721 - 2⁶ = 10070657 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10070694 and 10070703.

It is not an unprimeable number, because it can be changed into a prime (10070701) 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 5 ways as a sum of consecutive naturals, for example, 559476 + ... + 559493.

It is an arithmetic number, because the mean of its divisors is an integer number (2424435).

Almost surely, 2^10070721 is an apocalyptic number.

It is an amenable number.

10070721 is a deficient number, since it is larger than the sum of its proper divisors (4475889).

10070721 is a wasteful number, since it uses less digits than its factorization.

10070721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1118975 (or 1118972 counting only the distinct ones).

The product of its (nonzero) digits is 98, while the sum is 18.

The square root of 10070721 is about 3173.4399316830. The cubic root of 10070721 is about 215.9501556798.

Adding to 10070721 its reverse (12707001), we get a palindrome (22777722).

The spelling of 10070721 in words is "ten million, seventy thousand, seven hundred twenty-one".