1242001597 has 2 divisors, whose sum is σ = 1242001598. Its totient is φ = 1242001596.

The previous prime is 1242001559. The next prime is 1242001603. The reversal of 1242001597 is 7951002421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 836019396 + 405982201 = 28914^2 + 20149^2 .

It is an emirp because it is prime and its reverse (7951002421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1242001597 - 2⁷ = 1242001469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242001697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621000798 + 621000799.

It is an arithmetic number, because the mean of its divisors is an integer number (621000799).

Almost surely, 2^1242001597 is an apocalyptic number.

It is an amenable number.

1242001597 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242001597 is an equidigital number, since it uses as much as digits as its factorization.

1242001597 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 1242001597 is about 35242.0430310162. The cubic root of 1242001597 is about 1074.9148220234.

The spelling of 1242001597 in words is "one billion, two hundred forty-two million, one thousand, five hundred ninety-seven".