10520399 has 4 divisors (see below), whose sum is σ = 11139264. Its totient is φ = 9901536.

The previous prime is 10520383. The next prime is 10520401. The reversal of 10520399 is 99302501.

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

It is a cyclic number.

It is not a de Polignac number, because 10520399 - 2⁴ = 10520383 is a prime.

It is a super-2 number, since 2×10520399² = 221357590238402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10520309) 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 3 ways as a sum of consecutive naturals, for example, 309407 + ... + 309440.

It is an arithmetic number, because the mean of its divisors is an integer number (2784816).

Almost surely, 2^10520399 is an apocalyptic number.

10520399 is a deficient number, since it is larger than the sum of its proper divisors (618865).

10520399 is an equidigital number, since it uses as much as digits as its factorization.

10520399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618864.

The product of its (nonzero) digits is 2430, while the sum is 29.

The square root of 10520399 is about 3243.5164559472. The cubic root of 10520399 is about 219.1176713107.

The spelling of 10520399 in words is "ten million, five hundred twenty thousand, three hundred ninety-nine".