12671491 has 4 divisors (see below), whose sum is σ = 14481712. Its totient is φ = 10861272.

The previous prime is 12671479. The next prime is 12671531. The reversal of 12671491 is 19417621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12671491 - 2¹⁷ = 12540419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12671431) 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, 905100 + ... + 905113.

It is an arithmetic number, because the mean of its divisors is an integer number (3620428).

Almost surely, 2^12671491 is an apocalyptic number.

12671491 is a deficient number, since it is larger than the sum of its proper divisors (1810221).

12671491 is an equidigital number, since it uses as much as digits as its factorization.

12671491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1810220.

The product of its digits is 3024, while the sum is 31.

The square root of 12671491 is about 3559.7037798109. The cubic root of 12671491 is about 233.1359457661.

It can be divided in two parts, 126 and 71491, that added together give a palindrome (71617).

The spelling of 12671491 in words is "twelve million, six hundred seventy-one thousand, four hundred ninety-one".