10391247 has 10 divisors (see below), whose sum is σ = 15522848. Its totient is φ = 6927444.

The previous prime is 10391221. The next prime is 10391279. The reversal of 10391247 is 74219301.

It is not a de Polignac number, because 10391247 - 2¹² = 10387151 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10391247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10398247) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 64063 + ... + 64224.

Almost surely, 2^10391247 is an apocalyptic number.

10391247 is a deficient number, since it is larger than the sum of its proper divisors (5131601).

10391247 is an equidigital number, since it uses as much as digits as its factorization.

10391247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128299 (or 128290 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 10391247 is about 3223.5457186148. The cubic root of 10391247 is about 218.2173224892.

The spelling of 10391247 in words is "ten million, three hundred ninety-one thousand, two hundred forty-seven".