12150661 has 4 divisors (see below), whose sum is σ = 12159532. Its totient is φ = 12141792.

The previous prime is 12150641. The next prime is 12150673. The reversal of 12150661 is 16605121.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 8468100 + 3682561 = 2910^2 + 1919^2 .

It is a cyclic number.

It is not a de Polignac number, because 12150661 - 2⁷ = 12150533 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 (12150641) 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 3 ways as a sum of consecutive naturals, for example, 1896 + ... + 5281.

It is an arithmetic number, because the mean of its divisors is an integer number (3039883).

Almost surely, 2^12150661 is an apocalyptic number.

It is an amenable number.

12150661 is a deficient number, since it is larger than the sum of its proper divisors (8871).

12150661 is an equidigital number, since it uses as much as digits as its factorization.

12150661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8870.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 12150661 is about 3485.7798266672. The cubic root of 12150661 is about 229.8969986181.

Adding to 12150661 its reverse (16605121), we get a palindrome (28755782).

The spelling of 12150661 in words is "twelve million, one hundred fifty thousand, six hundred sixty-one".