12161276 has 12 divisors (see below), whose sum is σ = 21372960. Its totient is φ = 6054720.

The previous prime is 12161251. The next prime is 12161287. The reversal of 12161276 is 67216121.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

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, 5405 + ... + 7316.

It is an arithmetic number, because the mean of its divisors is an integer number (1781080).

Almost surely, 2^12161276 is an apocalyptic number.

It is an amenable number.

12161276 is a deficient number, since it is larger than the sum of its proper divisors (9211684).

12161276 is a wasteful number, since it uses less digits than its factorization.

12161276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12964 (or 12962 counting only the distinct ones).

The product of its digits is 1008, while the sum is 26.

The square root of 12161276 is about 3487.3021090809. The cubic root of 12161276 is about 229.9639262895.

Adding to 12161276 its reverse (67216121), we get a palindrome (79377397).

The spelling of 12161276 in words is "twelve million, one hundred sixty-one thousand, two hundred seventy-six".