1242107047 has 2 divisors, whose sum is σ = 1242107048. Its totient is φ = 1242107046.

The previous prime is 1242106997. The next prime is 1242107063. The reversal of 1242107047 is 7407012421.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1242107047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242107077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621053523 + 621053524.

It is an arithmetic number, because the mean of its divisors is an integer number (621053524).

Almost surely, 2^1242107047 is an apocalyptic number.

1242107047 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242107047 is an equidigital number, since it uses as much as digits as its factorization.

1242107047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 1242107047 is about 35243.5390816530. The cubic root of 1242107047 is about 1074.9452424245.

Adding to 1242107047 its reverse (7407012421), we get a palindrome (8649119468).

The spelling of 1242107047 in words is "one billion, two hundred forty-two million, one hundred seven thousand, forty-seven".