12051506 has 4 divisors (see below), whose sum is σ = 18077262. Its totient is φ = 6025752.

The previous prime is 12051493. The next prime is 12051509. The reversal of 12051506 is 60515021.

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

It can be written as a sum of positive squares in only one way, i.e., 7812025 + 4239481 = 2795^2 + 2059^2 .

It is not an unprimeable number, because it can be changed into a prime (12051509) 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 as a sum of consecutive naturals, namely, 3012875 + ... + 3012878.

Almost surely, 2^12051506 is an apocalyptic number.

12051506 is a deficient number, since it is larger than the sum of its proper divisors (6025756).

12051506 is an equidigital number, since it uses as much as digits as its factorization.

12051506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6025755.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 12051506 is about 3471.5279056922. The cubic root of 12051506 is about 229.2699346077.

Adding to 12051506 its reverse (60515021), we get a palindrome (72566527).

The spelling of 12051506 in words is "twelve million, fifty-one thousand, five hundred six".