10272721 has 4 divisors (see below), whose sum is σ = 10279152. Its totient is φ = 10266292.

The previous prime is 10272719. The next prime is 10272733. The reversal of 10272721 is 12727201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12727201 = 29 ⋅438869.

It is a cyclic number.

It is not a de Polignac number, because 10272721 - 2¹ = 10272719 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10272692 and 10272701.

It is not an unprimeable number, because it can be changed into a prime (10272761) 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, 1230 + ... + 4696.

It is an arithmetic number, because the mean of its divisors is an integer number (2569788).

Almost surely, 2^10272721 is an apocalyptic number.

It is an amenable number.

10272721 is a deficient number, since it is larger than the sum of its proper divisors (6431).

10272721 is an equidigital number, since it uses as much as digits as its factorization.

10272721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6430.

The product of its (nonzero) digits is 392, while the sum is 22.

The square root of 10272721 is about 3205.1085785040. The cubic root of 10272721 is about 217.3844614698.

Adding to 10272721 its reverse (12727201), we get a palindrome (22999922).

The spelling of 10272721 in words is "ten million, two hundred seventy-two thousand, seven hundred twenty-one".