12190815 has 72 divisors (see below), whose sum is σ = 26264160. Its totient is φ = 5121792.

The previous prime is 12190777. The next prime is 12190847. The reversal of 12190815 is 51809121.

12190815 is digitally balanced in base 2, base 4 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12190815 - 2⁸ = 12190559 is a prime.

12190815 is strictly pandigital in base 8.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 53121 + ... + 53349.

It is an arithmetic number, because the mean of its divisors is an integer number (364780).

Almost surely, 2^12190815 is an apocalyptic number.

12190815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12190815 is an abundant number, since it is smaller than the sum of its proper divisors (14073345).

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

12190815 is a wasteful number, since it uses less digits than its factorization.

12190815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273 (or 257 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 27.

The square root of 12190815 is about 3491.5347628228. The cubic root of 12190815 is about 230.1499652100.

Adding to 12190815 its reverse (51809121), we get a palindrome (63999936).

The spelling of 12190815 in words is "twelve million, one hundred ninety thousand, eight hundred fifteen".