10491905 has 8 divisors (see below), whose sum is σ = 12930792. Its totient is φ = 8166528.

The previous prime is 10491869. The next prime is 10491913. The reversal of 10491905 is 50919401.

It can be written as a sum of positive squares in 4 ways, for example, as 3690241 + 6801664 = 1921^2 + 2608^2 .

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 10491905 - 2¹⁰ = 10490881 is a prime.

It is a super-2 number, since 2×10491905² = 220160141058050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28172 + ... + 28541.

It is an arithmetic number, because the mean of its divisors is an integer number (1616349).

Almost surely, 2^10491905 is an apocalyptic number.

It is an amenable number.

10491905 is a deficient number, since it is larger than the sum of its proper divisors (2438887).

10491905 is an equidigital number, since it uses as much as digits as its factorization.

10491905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56755.

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 10491905 is about 3239.1210227468. The cubic root of 10491905 is about 218.9196691817.

The spelling of 10491905 in words is "ten million, four hundred ninety-one thousand, nine hundred five".