12181602 has 8 divisors (see below), whose sum is σ = 24363216. Its totient is φ = 4060532.

The previous prime is 12181579. The next prime is 12181607. The reversal of 12181602 is 20618121.

It is a sphenic number, since it is the product of 3 distinct primes.

12181602 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (12181607) 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 3 ways as a sum of consecutive naturals, for example, 1015128 + ... + 1015139.

It is an arithmetic number, because the mean of its divisors is an integer number (3045402).

Almost surely, 2^12181602 is an apocalyptic number.

12181602 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12181602 is a wasteful number, since it uses less digits than its factorization.

12181602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2030272.

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 12181602 is about 3490.2151796129. The cubic root of 12181602 is about 230.0919732984.

Adding to 12181602 its reverse (20618121), we get a palindrome (32799723).

The spelling of 12181602 in words is "twelve million, one hundred eighty-one thousand, six hundred two".