1242119897 has 2 divisors, whose sum is σ = 1242119898. Its totient is φ = 1242119896.

The previous prime is 1242119891. The next prime is 1242119903. The reversal of 1242119897 is 7989112421.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (1242119891) and next prime (1242119903).

It can be written as a sum of positive squares in only one way, i.e., 891082201 + 351037696 = 29851^2 + 18736^2 .

It is a cyclic number.

It is not a de Polignac number, because 1242119897 - 2⁶ = 1242119833 is a prime.

It is not a weakly prime, because it can be changed into another prime (1242119891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621059948 + 621059949.

It is an arithmetic number, because the mean of its divisors is an integer number (621059949).

Almost surely, 2^1242119897 is an apocalyptic number.

It is an amenable number.

1242119897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242119897 is an equidigital number, since it uses as much as digits as its factorization.

1242119897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 44.

The square root of 1242119897 is about 35243.7213840990. The cubic root of 1242119897 is about 1074.9489492973.

The spelling of 1242119897 in words is "one billion, two hundred forty-two million, one hundred nineteen thousand, eight hundred ninety-seven".