12190521 has 16 divisors (see below), whose sum is σ = 18892800. Its totient is φ = 6847248.

The previous prime is 12190517. The next prime is 12190537. The reversal of 12190521 is 12509121.

12190521 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12190521 - 2² = 12190517 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (12190511) 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 15 ways as a sum of consecutive naturals, for example, 3681 + ... + 6158.

It is an arithmetic number, because the mean of its divisors is an integer number (1180800).

Almost surely, 2^12190521 is an apocalyptic number.

It is an amenable number.

12190521 is a deficient number, since it is larger than the sum of its proper divisors (6702279).

12190521 is an equidigital number, since it uses as much as digits as its factorization.

12190521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9908.

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 12190521 is about 3491.4926607398. The cubic root of 12190521 is about 230.1481150566.

Adding to 12190521 its reverse (12509121), we get a palindrome (24699642).

The spelling of 12190521 in words is "twelve million, one hundred ninety thousand, five hundred twenty-one".