12161651 has 2 divisors, whose sum is σ = 12161652. Its totient is φ = 12161650.

The previous prime is 12161629. The next prime is 12161663. The reversal of 12161651 is 15616121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12161651 - 2⁶ = 12161587 is a prime.

It is not a weakly prime, because it can be changed into another prime (12161251) 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, 6080825 + 6080826.

It is an arithmetic number, because the mean of its divisors is an integer number (6080826).

Almost surely, 2^12161651 is an apocalyptic number.

12161651 is a deficient number, since it is larger than the sum of its proper divisors (1).

12161651 is an equidigital number, since it uses as much as digits as its factorization.

12161651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 360, while the sum is 23.

The square root of 12161651 is about 3487.3558751581. The cubic root of 12161651 is about 229.9662899555.

Adding to 12161651 its reverse (15616121), we get a palindrome (27777772).

The spelling of 12161651 in words is "twelve million, one hundred sixty-one thousand, six hundred fifty-one".