1201808071 has 4 divisors (see below), whose sum is σ = 1204663144. Its totient is φ = 1198953000.

The previous prime is 1201808059. The next prime is 1201808077. The reversal of 1201808071 is 1708081021.

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 1201808071 - 2¹⁷ = 1201676999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201808077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1426905 + ... + 1427746.

It is an arithmetic number, because the mean of its divisors is an integer number (301165786).

Almost surely, 2^1201808071 is an apocalyptic number.

1201808071 is a deficient number, since it is larger than the sum of its proper divisors (2855073).

1201808071 is an equidigital number, since it uses as much as digits as its factorization.

1201808071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2855072.

The product of its (nonzero) digits is 896, while the sum is 28.

The square root of 1201808071 is about 34667.1035853877. The cubic root of 1201808071 is about 1063.1920130604.

Adding to 1201808071 its reverse (1708081021), we get a palindrome (2909889092).

The spelling of 1201808071 in words is "one billion, two hundred one million, eight hundred eight thousand, seventy-one".