10491865 has 8 divisors (see below), whose sum is σ = 12778560. Its totient is φ = 8267952.

The previous prime is 10491853. The next prime is 10491869. The reversal of 10491865 is 56819401.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10491865 - 2¹⁷ = 10360793 is a prime.

It is a super-2 number, since 2×10491865² = 220158462356450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10491865.

It is not an unprimeable number, because it can be changed into a prime (10491869) 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 7 ways as a sum of consecutive naturals, for example, 15325 + ... + 15994.

It is an arithmetic number, because the mean of its divisors is an integer number (1597320).

Almost surely, 2^10491865 is an apocalyptic number.

It is an amenable number.

10491865 is a deficient number, since it is larger than the sum of its proper divisors (2286695).

10491865 is an equidigital number, since it uses as much as digits as its factorization.

10491865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31391.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 10491865 is about 3239.1148482263. The cubic root of 10491865 is about 218.9193909736.

The spelling of 10491865 in words is "ten million, four hundred ninety-one thousand, eight hundred sixty-five".