1242106997 has 2 divisors, whose sum is σ = 1242106998. Its totient is φ = 1242106996.

The previous prime is 1242106979. The next prime is 1242107047. The reversal of 1242106997 is 7996012421.

Together with previous prime (1242106979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 661827076 + 580279921 = 25726^2 + 24089^2 .

It is a cyclic number.

It is not a de Polignac number, because 1242106997 - 2¹⁶ = 1242041461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242106907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621053498 + 621053499.

It is an arithmetic number, because the mean of its divisors is an integer number (621053499).

Almost surely, 2^1242106997 is an apocalyptic number.

It is an amenable number.

1242106997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242106997 is an equidigital number, since it uses as much as digits as its factorization.

1242106997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 1242106997 is about 35243.5383723031. The cubic root of 1242106997 is about 1074.9452280008.

The spelling of 1242106997 in words is "one billion, two hundred forty-two million, one hundred six thousand, nine hundred ninety-seven".