242115397 has 2 divisors, whose sum is σ = 242115398. Its totient is φ = 242115396.

The previous prime is 242115389. The next prime is 242115437. The reversal of 242115397 is 793511242.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 214300321 + 27815076 = 14639^2 + 5274^2 .

It is a cyclic number.

It is not a de Polignac number, because 242115397 - 2³ = 242115389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242115317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121057698 + 121057699.

It is an arithmetic number, because the mean of its divisors is an integer number (121057699).

Almost surely, 2^242115397 is an apocalyptic number.

It is an amenable number.

242115397 is a deficient number, since it is larger than the sum of its proper divisors (1).

242115397 is an equidigital number, since it uses as much as digits as its factorization.

242115397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 34.

The square root of 242115397 is about 15560.0577441088. The cubic root of 242115397 is about 623.2670046447.

The spelling of 242115397 in words is "two hundred forty-two million, one hundred fifteen thousand, three hundred ninety-seven".