12891477 has 16 divisors (see below), whose sum is σ = 18160128. Its totient is φ = 8118000.

The previous prime is 12891469. The next prime is 12891479. The reversal of 12891477 is 77419821.

12891477 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12891477 - 2³ = 12891469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12891479) 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, 4602 + ... + 6852.

It is an arithmetic number, because the mean of its divisors is an integer number (1135008).

Almost surely, 2^12891477 is an apocalyptic number.

It is an amenable number.

12891477 is a deficient number, since it is larger than the sum of its proper divisors (5268651).

12891477 is a wasteful number, since it uses less digits than its factorization.

12891477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2360.

The product of its digits is 28224, while the sum is 39.

The square root of 12891477 is about 3590.4703034561. The cubic root of 12891477 is about 234.4773475845.

The spelling of 12891477 in words is "twelve million, eight hundred ninety-one thousand, four hundred seventy-seven".