12161436 has 24 divisors (see below), whose sum is σ = 32430720. Its totient is φ = 3474672.

The previous prime is 12161431. The next prime is 12161437. The reversal of 12161436 is 63416121.

12161436 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12161431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72306 + ... + 72473.

It is an arithmetic number, because the mean of its divisors is an integer number (1351280).

Almost surely, 2^12161436 is an apocalyptic number.

It is an amenable number.

12161436 is an abundant number, since it is smaller than the sum of its proper divisors (20269284).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12161436 is a wasteful number, since it uses less digits than its factorization.

12161436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144793 (or 144791 counting only the distinct ones).

The product of its digits is 864, while the sum is 24.

The square root of 12161436 is about 3487.3250493752. The cubic root of 12161436 is about 229.9649347929.

Adding to 12161436 its reverse (63416121), we get a palindrome (75577557).

The spelling of 12161436 in words is "twelve million, one hundred sixty-one thousand, four hundred thirty-six".