10247509 has 4 divisors (see below), whose sum is σ = 10261804. Its totient is φ = 10233216.

The previous prime is 10247507. The next prime is 10247513. The reversal of 10247509 is 90574201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90574201 = 457 ⋅198193.

It can be written as a sum of positive squares in 2 ways, for example, as 8614225 + 1633284 = 2935^2 + 1278^2 .

It is a cyclic number.

It is not a de Polignac number, because 10247509 - 2¹ = 10247507 is a prime.

It is a super-2 number, since 2×10247509² = 210022881410162, 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 (10247507) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 6012 + ... + 7525.

It is an arithmetic number, because the mean of its divisors is an integer number (2565451).

Almost surely, 2^10247509 is an apocalyptic number.

It is an amenable number.

10247509 is a deficient number, since it is larger than the sum of its proper divisors (14295).

10247509 is an equidigital number, since it uses as much as digits as its factorization.

10247509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14294.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 10247509 is about 3201.1730662368. The cubic root of 10247509 is about 217.2064759467.

The spelling of 10247509 in words is "ten million, two hundred forty-seven thousand, five hundred nine".