12743421 has 8 divisors (see below), whose sum is σ = 17990784. Its totient is φ = 7995840.

The previous prime is 12743413. The next prime is 12743431. The reversal of 12743421 is 12434721.

It is a happy number.

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

It is not a de Polignac number, because 12743421 - 2³ = 12743413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12743391 and 12743400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12743431) 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, 124885 + ... + 124986.

It is an arithmetic number, because the mean of its divisors is an integer number (2248848).

Almost surely, 2^12743421 is an apocalyptic number.

It is an amenable number.

12743421 is a deficient number, since it is larger than the sum of its proper divisors (5247363).

12743421 is a wasteful number, since it uses less digits than its factorization.

12743421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249891.

The product of its digits is 1344, while the sum is 24.

The square root of 12743421 is about 3569.7928511330. The cubic root of 12743421 is about 233.5762474774.

The spelling of 12743421 in words is "twelve million, seven hundred forty-three thousand, four hundred twenty-one".