1242054197 has 2 divisors, whose sum is σ = 1242054198. Its totient is φ = 1242054196.

The previous prime is 1242054169. The next prime is 1242054217. The reversal of 1242054197 is 7914502421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1031630161 + 210424036 = 32119^2 + 14506^2 .

It is a cyclic number.

It is not a de Polignac number, because 1242054197 - 2⁶ = 1242054133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242054127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621027098 + 621027099.

It is an arithmetic number, because the mean of its divisors is an integer number (621027099).

Almost surely, 2^1242054197 is an apocalyptic number.

It is an amenable number.

1242054197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242054197 is an equidigital number, since it uses as much as digits as its factorization.

1242054197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 1242054197 is about 35242.7892908606. The cubic root of 1242054197 is about 1074.9299963789.

The spelling of 1242054197 in words is "one billion, two hundred forty-two million, fifty-four thousand, one hundred ninety-seven".