12891602 has 8 divisors (see below), whose sum is σ = 20004300. Its totient is φ = 6223504.

The previous prime is 12891601. The next prime is 12891607. The reversal of 12891602 is 20619821.

12891602 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 11566801 + 1324801 = 3401^2 + 1151^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (12891601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111077 + ... + 111192.

Almost surely, 2^12891602 is an apocalyptic number.

12891602 is a deficient number, since it is larger than the sum of its proper divisors (7112698).

12891602 is a wasteful number, since it uses less digits than its factorization.

12891602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222300.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 12891602 is about 3590.4877106042. The cubic root of 12891602 is about 234.4781054385.

The spelling of 12891602 in words is "twelve million, eight hundred ninety-one thousand, six hundred two".