10391265 has 36 divisors (see below), whose sum is σ = 18735444. Its totient is φ = 5323968.

The previous prime is 10391221. The next prime is 10391279. The reversal of 10391265 is 56219301.

10391265 is a `hidden beast` number, since 10 + 391 + 265 = 666.

10391265 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 6796449 + 3594816 = 2607^2 + 1896^2 .

It is not a de Polignac number, because 10391265 - 2⁷ = 10391137 is a prime.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 131496 + ... + 131574.

It is an arithmetic number, because the mean of its divisors is an integer number (520429).

Almost surely, 2^10391265 is an apocalyptic number.

10391265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

10391265 is a deficient number, since it is larger than the sum of its proper divisors (8344179).

10391265 is an equidigital number, since it uses as much as digits as its factorization.

10391265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 10391265 is about 3223.5485105703. The cubic root of 10391265 is about 218.2174484898.

It can be divided in two parts, 1039 and 1265, that added together give a square (2304 = 48²).

The spelling of 10391265 in words is "ten million, three hundred ninety-one thousand, two hundred sixty-five".