10512509 has 6 divisors (see below), whose sum is σ = 12228894. Its totient is φ = 9010680.

The previous prime is 10512493. The next prime is 10512533. The reversal of 10512509 is 90521501.

It can be written as a sum of positive squares in only one way, i.e., 9746884 + 765625 = 3122^2 + 875^2 .

It is not a de Polignac number, because 10512509 - 2⁴ = 10512493 is a prime.

It is a super-2 number, since 2×10512509² = 221025690950162, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10512539) 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 5 ways as a sum of consecutive naturals, for example, 107222 + ... + 107319.

It is an arithmetic number, because the mean of its divisors is an integer number (2038149).

Almost surely, 2^10512509 is an apocalyptic number.

It is an amenable number.

10512509 is a deficient number, since it is larger than the sum of its proper divisors (1716385).

10512509 is an equidigital number, since it uses as much as digits as its factorization.

10512509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214555 (or 214548 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 23.

The square root of 10512509 is about 3242.2999552787. The cubic root of 10512509 is about 219.0628802709.

The spelling of 10512509 in words is "ten million, five hundred twelve thousand, five hundred nine".