1201041663 has 4 divisors (see below), whose sum is σ = 1601388888. Its totient is φ = 800694440.

The previous prime is 1201041617. The next prime is 1201041689. The reversal of 1201041663 is 3661401021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1201041663 - 2⁹ = 1201041151 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201041613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200173608 + ... + 200173613.

It is an arithmetic number, because the mean of its divisors is an integer number (400347222).

Almost surely, 2^1201041663 is an apocalyptic number.

1201041663 is a deficient number, since it is larger than the sum of its proper divisors (400347225).

1201041663 is an equidigital number, since it uses as much as digits as its factorization.

1201041663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400347224.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 1201041663 is about 34656.0480003130. The cubic root of 1201041663 is about 1062.9659613981.

Adding to 1201041663 its reverse (3661401021), we get a palindrome (4862442684).

The spelling of 1201041663 in words is "one billion, two hundred one million, forty-one thousand, six hundred sixty-three".