12161715 has 32 divisors (see below), whose sum is σ = 21176640. Its totient is φ = 5935104.

The previous prime is 12161711. The next prime is 12161717. The reversal of 12161715 is 51716121.

It is not a de Polignac number, because 12161715 - 2² = 12161711 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12161711) 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 31 ways as a sum of consecutive naturals, for example, 8791 + ... + 10079.

It is an arithmetic number, because the mean of its divisors is an integer number (661770).

Almost surely, 2^12161715 is an apocalyptic number.

12161715 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12161715 is a deficient number, since it is larger than the sum of its proper divisors (9014925).

12161715 is a wasteful number, since it uses less digits than its factorization.

12161715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1351.

The product of its digits is 420, while the sum is 24.

The square root of 12161715 is about 3487.3650511525. The cubic root of 12161715 is about 229.9666933497.

Adding to 12161715 its reverse (51716121), we get a palindrome (63877836).

The spelling of 12161715 in words is "twelve million, one hundred sixty-one thousand, seven hundred fifteen".