12736442 has 4 divisors (see below), whose sum is σ = 19104666. Its totient is φ = 6368220.

The previous prime is 12736429. The next prime is 12736447. The reversal of 12736442 is 24463721.

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

It can be written as a sum of positive squares in only one way, i.e., 7678441 + 5058001 = 2771^2 + 2249^2 .

It is not an unprimeable number, because it can be changed into a prime (12736447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3184109 + ... + 3184112.

Almost surely, 2^12736442 is an apocalyptic number.

12736442 is a deficient number, since it is larger than the sum of its proper divisors (6368224).

12736442 is an equidigital number, since it uses as much as digits as its factorization.

12736442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6368223.

The product of its digits is 8064, while the sum is 29.

The square root of 12736442 is about 3568.8152095619. The cubic root of 12736442 is about 233.5335999470.

The spelling of 12736442 in words is "twelve million, seven hundred thirty-six thousand, four hundred forty-two".