1201555363 has 2 divisors, whose sum is σ = 1201555364. Its totient is φ = 1201555362.

The previous prime is 1201555297. The next prime is 1201555403. The reversal of 1201555363 is 3635551021.

It is a strong prime.

It is an emirp because it is prime and its reverse (3635551021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1201555363 - 2²⁵ = 1168000931 is a prime.

It is not a weakly prime, because it can be changed into another prime (1201553363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600777681 + 600777682.

It is an arithmetic number, because the mean of its divisors is an integer number (600777682).

Almost surely, 2^1201555363 is an apocalyptic number.

1201555363 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201555363 is an equidigital number, since it uses as much as digits as its factorization.

1201555363 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13500, while the sum is 31.

The square root of 1201555363 is about 34663.4586127813. The cubic root of 1201555363 is about 1063.1174875829.

The spelling of 1201555363 in words is "one billion, two hundred one million, five hundred fifty-five thousand, three hundred sixty-three".