12981606 has 24 divisors (see below), whose sum is σ = 28539672. Its totient is φ = 3933600.

The previous prime is 12981601. The next prime is 12981611. The reversal of 12981606 is 60618921.

It is an interprime number because it is at equal distance from previous prime (12981601) and next prime (12981611).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12981601) 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 11 ways as a sum of consecutive naturals, for example, 8215 + ... + 9666.

It is an arithmetic number, because the mean of its divisors is an integer number (1189153).

Almost surely, 2^12981606 is an apocalyptic number.

12981606 is an abundant number, since it is smaller than the sum of its proper divisors (15558066).

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

12981606 is a wasteful number, since it uses less digits than its factorization.

12981606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17908 (or 17897 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 12981606 is about 3602.9995836802. Note that the first 3 decimals coincide. The cubic root of 12981606 is about 235.0225178362.

The spelling of 12981606 in words is "twelve million, nine hundred eighty-one thousand, six hundred six".