12907191 has 36 divisors (see below), whose sum is σ = 20074488. Its totient is φ = 7365600.

The previous prime is 12907183. The next prime is 12907217. The reversal of 12907191 is 19170921.

It is not a de Polignac number, because 12907191 - 2³ = 12907183 is a prime.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12907121) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 348825 + ... + 348861.

Almost surely, 2^12907191 is an apocalyptic number.

12907191 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12907191 is a deficient number, since it is larger than the sum of its proper divisors (7167297).

12907191 is a wasteful number, since it uses less digits than its factorization.

12907191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124 (or 82 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 30.

The square root of 12907191 is about 3592.6579297228. The cubic root of 12907191 is about 234.5725805552.

The spelling of 12907191 in words is "twelve million, nine hundred seven thousand, one hundred ninety-one".