12743391 has 8 divisors (see below), whose sum is σ = 17224240. Its totient is φ = 8379072.

The previous prime is 12743389. The next prime is 12743399. The reversal of 12743391 is 19334721.

12743391 = T₅₅₄ + T₅₅₅ + ... + T₆₂₆.

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

It is not a de Polignac number, because 12743391 - 2¹ = 12743389 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 (12743399) 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, 28876 + ... + 29313.

It is an arithmetic number, because the mean of its divisors is an integer number (2153030).

Almost surely, 2^12743391 is an apocalyptic number.

12743391 is a deficient number, since it is larger than the sum of its proper divisors (4480849).

12743391 is an equidigital number, since it uses as much as digits as its factorization.

12743391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58265.

The product of its digits is 4536, while the sum is 30.

The square root of 12743391 is about 3569.7886492060. The cubic root of 12743391 is about 233.5760641856.

The spelling of 12743391 in words is "twelve million, seven hundred forty-three thousand, three hundred ninety-one".