12739406 has 4 divisors (see below), whose sum is σ = 19109112. Its totient is φ = 6369702.

The previous prime is 12739403. The next prime is 12739429. The reversal of 12739406 is 60493721.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12739403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3184850 + ... + 3184853.

It is an arithmetic number, because the mean of its divisors is an integer number (4777278).

Almost surely, 2^12739406 is an apocalyptic number.

12739406 is a deficient number, since it is larger than the sum of its proper divisors (6369706).

12739406 is an equidigital number, since it uses as much as digits as its factorization.

12739406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6369705.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 12739406 is about 3569.2304492705. The cubic root of 12739406 is about 233.5517143702.

The spelling of 12739406 in words is "twelve million, seven hundred thirty-nine thousand, four hundred six".