12991602 has 32 divisors (see below), whose sum is σ = 28159488. Its totient is φ = 3972096.

The previous prime is 12991571. The next prime is 12991603. The reversal of 12991602 is 20619921.

It is a happy number.

12991602 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 12991602.

It is not an unprimeable number, because it can be changed into a prime (12991603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14623 + ... + 15485.

It is an arithmetic number, because the mean of its divisors is an integer number (879984).

Almost surely, 2^12991602 is an apocalyptic number.

12991602 is an abundant number, since it is smaller than the sum of its proper divisors (15167886).

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

12991602 is a wasteful number, since it uses less digits than its factorization.

12991602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 12991602 is about 3604.3864942595. The cubic root of 12991602 is about 235.0828257918.

The spelling of 12991602 in words is "twelve million, nine hundred ninety-one thousand, six hundred two".