1201800871 has 2 divisors, whose sum is σ = 1201800872. Its totient is φ = 1201800870.

The previous prime is 1201800827. The next prime is 1201800893. The reversal of 1201800871 is 1780081021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1201800871 - 2⁹ = 1201800359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1201810871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600900435 + 600900436.

It is an arithmetic number, because the mean of its divisors is an integer number (600900436).

Almost surely, 2^1201800871 is an apocalyptic number.

1201800871 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201800871 is an equidigital number, since it uses as much as digits as its factorization.

1201800871 is an evil number, because the sum of its binary digits is even.

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

The square root of 1201800871 is about 34666.9997403871. Note that the first 3 decimals coincide. The cubic root of 1201800871 is about 1063.1898898712.

Adding to 1201800871 its reverse (1780081021), we get a palindrome (2981881892).

The spelling of 1201800871 in words is "one billion, two hundred one million, eight hundred thousand, eight hundred seventy-one".