12812511 has 4 divisors (see below), whose sum is σ = 17083352. Its totient is φ = 8541672.

The previous prime is 12812497. The next prime is 12812531. The reversal of 12812511 is 11521821.

12812511 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12812511 - 2¹¹ = 12810463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12812531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2135416 + ... + 2135421.

It is an arithmetic number, because the mean of its divisors is an integer number (4270838).

Almost surely, 2^12812511 is an apocalyptic number.

12812511 is a deficient number, since it is larger than the sum of its proper divisors (4270841).

12812511 is an equidigital number, since it uses as much as digits as its factorization.

12812511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4270840.

The product of its digits is 160, while the sum is 21.

The square root of 12812511 is about 3579.4568023654. The cubic root of 12812511 is about 233.9976075437.

The spelling of 12812511 in words is "twelve million, eight hundred twelve thousand, five hundred eleven".