10292721 has 4 divisors (see below), whose sum is σ = 13723632. Its totient is φ = 6861812.

The previous prime is 10292719. The next prime is 10292729. The reversal of 10292721 is 12729201.

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 an emirpimes, since its reverse is a distinct semiprime: 12729201 = 3 ⋅4243067.

It is a cyclic number.

It is not a de Polignac number, because 10292721 - 2¹ = 10292719 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10292691 and 10292700.

It is not an unprimeable number, because it can be changed into a prime (10292729) 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 3 ways as a sum of consecutive naturals, for example, 1715451 + ... + 1715456.

It is an arithmetic number, because the mean of its divisors is an integer number (3430908).

Almost surely, 2^10292721 is an apocalyptic number.

It is an amenable number.

10292721 is a deficient number, since it is larger than the sum of its proper divisors (3430911).

10292721 is an equidigital number, since it uses as much as digits as its factorization.

10292721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3430910.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 10292721 is about 3208.2270804917. The cubic root of 10292721 is about 217.5254455631.

The spelling of 10292721 in words is "ten million, two hundred ninety-two thousand, seven hundred twenty-one".