12510816 has 60 divisors (see below), whose sum is σ = 34665372. Its totient is φ = 3950784.

The previous prime is 12510811. The next prime is 12510821. The reversal of 12510816 is 61801521.

It is an interprime number because it is at equal distance from previous prime (12510811) and next prime (12510821).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12510811) 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 9 ways as a sum of consecutive naturals, for example, 658455 + ... + 658473.

Almost surely, 2^12510816 is an apocalyptic number.

12510816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12510816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17332686).

12510816 is an abundant number, since it is smaller than the sum of its proper divisors (22154556).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12510816 is an frugal number, since it uses more digits than its factorization.

12510816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89 (or 24 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 24.

The square root of 12510816 is about 3537.0631885789. The cubic root of 12510816 is about 232.1463602830.

Multiplying 12510816 by its sum of digits (24), we get a square (300259584 = 17328²).

12510816 divided by its sum of digits (24) gives a square (521284 = 722²).

The spelling of 12510816 in words is "twelve million, five hundred ten thousand, eight hundred sixteen".