12931005 has 8 divisors (see below), whose sum is σ = 20689632. Its totient is φ = 6896528.

The previous prime is 12930979. The next prime is 12931007. The reversal of 12931005 is 50013921.

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

It is a cyclic number.

It is not a de Polignac number, because 12931005 - 2⁶ = 12930941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12931007) 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, 431019 + ... + 431048.

It is an arithmetic number, because the mean of its divisors is an integer number (2586204).

Almost surely, 2^12931005 is an apocalyptic number.

12931005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12931005 is a deficient number, since it is larger than the sum of its proper divisors (7758627).

12931005 is an equidigital number, since it uses as much as digits as its factorization.

12931005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 862075.

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 12931005 is about 3595.9706617268. The cubic root of 12931005 is about 234.7167554692.

Adding to 12931005 its reverse (50013921), we get a palindrome (62944926).

The spelling of 12931005 in words is "twelve million, nine hundred thirty-one thousand, five".