1242001361 has 2 divisors, whose sum is σ = 1242001362. Its totient is φ = 1242001360.

The previous prime is 1242001339. The next prime is 1242001373. The reversal of 1242001361 is 1631002421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 690690961 + 551310400 = 26281^2 + 23480^2 .

It is an emirp because it is prime and its reverse (1631002421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1242001361 - 2¹⁴ = 1241984977 is a prime.

It is not a weakly prime, because it can be changed into another prime (1242001301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621000680 + 621000681.

It is an arithmetic number, because the mean of its divisors is an integer number (621000681).

Almost surely, 2^1242001361 is an apocalyptic number.

It is an amenable number.

1242001361 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242001361 is an equidigital number, since it uses as much as digits as its factorization.

1242001361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1242001361 is about 35242.0396827425. The cubic root of 1242001361 is about 1074.9147539398.

Adding to 1242001361 its reverse (1631002421), we get a palindrome (2873003782).

The spelling of 1242001361 in words is "one billion, two hundred forty-two million, one thousand, three hundred sixty-one".