12971749 has 4 divisors (see below), whose sum is σ = 14824864. Its totient is φ = 11118636.

The previous prime is 12971743. The next prime is 12971797. The reversal of 12971749 is 94717921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94717921 = 151 ⋅627271.

It is a cyclic number.

It is not a de Polignac number, because 12971749 - 2¹⁷ = 12840677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12971743) 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, 926547 + ... + 926560.

It is an arithmetic number, because the mean of its divisors is an integer number (3706216).

Almost surely, 2^12971749 is an apocalyptic number.

It is an amenable number.

12971749 is a deficient number, since it is larger than the sum of its proper divisors (1853115).

12971749 is an equidigital number, since it uses as much as digits as its factorization.

12971749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1853114.

The product of its digits is 31752, while the sum is 40.

The square root of 12971749 is about 3601.6314358912. The cubic root of 12971749 is about 234.9630181733.

The spelling of 12971749 in words is "twelve million, nine hundred seventy-one thousand, seven hundred forty-nine".