12161547 has 6 divisors (see below), whose sum is σ = 17566692. Its totient is φ = 8107692.

The previous prime is 12161533. The next prime is 12161563. The reversal of 12161547 is 74516121.

It is a happy number.

12161547 is a `hidden beast` number, since 1 + 2 + 1 + 615 + 47 = 666.

It is not a de Polignac number, because 12161547 - 2⁴ = 12161531 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12161547.

It is not an unprimeable number, because it can be changed into a prime (12161587) 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 5 ways as a sum of consecutive naturals, for example, 675633 + ... + 675650.

It is an arithmetic number, because the mean of its divisors is an integer number (2927782).

Almost surely, 2^12161547 is an apocalyptic number.

12161547 is a deficient number, since it is larger than the sum of its proper divisors (5405145).

12161547 is a wasteful number, since it uses less digits than its factorization.

12161547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1351289 (or 1351286 counting only the distinct ones).

The product of its digits is 1680, while the sum is 27.

The square root of 12161547 is about 3487.3409641158. The cubic root of 12161547 is about 229.9656344370.

Adding to 12161547 its reverse (74516121), we get a palindrome (86677668).

The spelling of 12161547 in words is "twelve million, one hundred sixty-one thousand, five hundred forty-seven".