1201800159 has 80 divisors (see below), whose sum is σ = 2226159936. Its totient is φ = 630374400.

The previous prime is 1201800143. The next prime is 1201800161. The reversal of 1201800159 is 9510081021.

It is not a de Polignac number, because 1201800159 - 2⁴ = 1201800143 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201800109) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 393679 + ... + 396719.

Almost surely, 2^1201800159 is an apocalyptic number.

1201800159 is a deficient number, since it is larger than the sum of its proper divisors (1024359777).

1201800159 is a wasteful number, since it uses less digits than its factorization.

1201800159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3118 (or 3109 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 27.

The square root of 1201800159 is about 34666.9894712535. The cubic root of 1201800159 is about 1063.1896799109.

The spelling of 1201800159 in words is "one billion, two hundred one million, eight hundred thousand, one hundred fifty-nine".