10270721 has 4 divisors (see below), whose sum is σ = 10300500. Its totient is φ = 10240944.

The previous prime is 10270717. The next prime is 10270723. The reversal of 10270721 is 12707201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8673025 + 1597696 = 2945^2 + 1264^2 .

It is a cyclic number.

It is not a de Polignac number, because 10270721 - 2² = 10270717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10270693 and 10270702.

It is not an unprimeable number, because it can be changed into a prime (10270723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14366 + ... + 15063.

It is an arithmetic number, because the mean of its divisors is an integer number (2575125).

Almost surely, 2^10270721 is an apocalyptic number.

It is an amenable number.

10270721 is a deficient number, since it is larger than the sum of its proper divisors (29779).

10270721 is an equidigital number, since it uses as much as digits as its factorization.

10270721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29778.

The product of its (nonzero) digits is 196, while the sum is 20.

The square root of 10270721 is about 3204.7965614060. The cubic root of 10270721 is about 217.3703529994.

Adding to 10270721 its reverse (12707201), we get a palindrome (22977922).

The spelling of 10270721 in words is "ten million, two hundred seventy thousand, seven hundred twenty-one".