12740242 has 8 divisors (see below), whose sum is σ = 20234556. Its totient is φ = 5995392.

The previous prime is 12740209. The next prime is 12740249. The reversal of 12740242 is 24204721.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9603801 + 3136441 = 3099^2 + 1771^2 .

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

It is not an unprimeable number, because it can be changed into a prime (12740249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187323 + ... + 187390.

Almost surely, 2^12740242 is an apocalyptic number.

12740242 is a deficient number, since it is larger than the sum of its proper divisors (7494314).

12740242 is a wasteful number, since it uses less digits than its factorization.

12740242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374732.

The product of its (nonzero) digits is 896, while the sum is 22.

The square root of 12740242 is about 3569.3475594288. The cubic root of 12740242 is about 233.5568230585.

Adding to 12740242 its reverse (24204721), we get a palindrome (36944963).

The spelling of 12740242 in words is "twelve million, seven hundred forty thousand, two hundred forty-two".