12547742 has 8 divisors (see below), whose sum is σ = 19640016. Its totient is φ = 6001072.

The previous prime is 12547729. The next prime is 12547747. The reversal of 12547742 is 24774521.

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

It is a junction number, because it is equal to n+sod(n) for n = 12547699 and 12547708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12547747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136343 + ... + 136434.

It is an arithmetic number, because the mean of its divisors is an integer number (2455002).

Almost surely, 2^12547742 is an apocalyptic number.

12547742 is a deficient number, since it is larger than the sum of its proper divisors (7092274).

12547742 is a wasteful number, since it uses less digits than its factorization.

12547742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272802.

The product of its digits is 15680, while the sum is 32.

The square root of 12547742 is about 3542.2792097744. The cubic root of 12547742 is about 232.3745312932.

The spelling of 12547742 in words is "twelve million, five hundred forty-seven thousand, seven hundred forty-two".