12891629 has 8 divisors (see below), whose sum is σ = 13401600. Its totient is φ = 12387600.

The previous prime is 12891623. The next prime is 12891647. The reversal of 12891629 is 92619821.

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

It is not a de Polignac number, because 12891629 - 2²⁰ = 11843053 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12891592 and 12891601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12891623) 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, 3224 + ... + 6014.

It is an arithmetic number, because the mean of its divisors is an integer number (1675200).

Almost surely, 2^12891629 is an apocalyptic number.

It is an amenable number.

12891629 is a deficient number, since it is larger than the sum of its proper divisors (509971).

12891629 is a wasteful number, since it uses less digits than its factorization.

12891629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2971.

The product of its digits is 15552, while the sum is 38.

The square root of 12891629 is about 3590.4914705371. The cubic root of 12891629 is about 234.4782691344.

The spelling of 12891629 in words is "twelve million, eight hundred ninety-one thousand, six hundred twenty-nine".