12731242 has 8 divisors (see below), whose sum is σ = 19247616. Its totient is φ = 6315372.

The previous prime is 12731237. The next prime is 12731281. The reversal of 12731242 is 24213721.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24808 + ... + 25315.

It is an arithmetic number, because the mean of its divisors is an integer number (2405952).

Almost surely, 2^12731242 is an apocalyptic number.

12731242 is a deficient number, since it is larger than the sum of its proper divisors (6516374).

12731242 is a wasteful number, since it uses less digits than its factorization.

12731242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50252.

The product of its digits is 672, while the sum is 22.

The square root of 12731242 is about 3568.0866020880. The cubic root of 12731242 is about 233.5018134657.

Adding to 12731242 its reverse (24213721), we get a palindrome (36944963).

The spelling of 12731242 in words is "twelve million, seven hundred thirty-one thousand, two hundred forty-two".