10791521 has 4 divisors (see below), whose sum is σ = 11621652. Its totient is φ = 9961392.

The previous prime is 10791511. The next prime is 10791527. The reversal of 10791521 is 12519701.

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 7317025 + 3474496 = 2705^2 + 1864^2 .

It is a cyclic number.

It is not a de Polignac number, because 10791521 - 2¹⁰ = 10790497 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (10791527) 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, 415046 + ... + 415071.

It is an arithmetic number, because the mean of its divisors is an integer number (2905413).

Almost surely, 2^10791521 is an apocalyptic number.

It is an amenable number.

10791521 is a deficient number, since it is larger than the sum of its proper divisors (830131).

10791521 is an equidigital number, since it uses as much as digits as its factorization.

10791521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830130.

The product of its (nonzero) digits is 630, while the sum is 26.

The square root of 10791521 is about 3285.0450529635. The cubic root of 10791521 is about 220.9840286568.

The spelling of 10791521 in words is "ten million, seven hundred ninety-one thousand, five hundred twenty-one".