1200115001 has 4 divisors (see below), whose sum is σ = 1200213732. Its totient is φ = 1200016272.

The previous prime is 1200114989. The next prime is 1200115003. The reversal of 1200115001 is 1005110021.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 746382400 + 453732601 = 27320^2 + 21301^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200115001 - 2¹⁰ = 1200113977 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1200115003) 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, 28070 + ... + 56463.

It is an arithmetic number, because the mean of its divisors is an integer number (300053433).

Almost surely, 2^1200115001 is an apocalyptic number.

It is an amenable number.

1200115001 is a deficient number, since it is larger than the sum of its proper divisors (98731).

1200115001 is an equidigital number, since it uses as much as digits as its factorization.

1200115001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98730.

The product of its (nonzero) digits is 10, while the sum is 11.

The square root of 1200115001 is about 34642.6760080684. The cubic root of 1200115001 is about 1062.6925144311.

Adding to 1200115001 its reverse (1005110021), we get a palindrome (2205225022).

The spelling of 1200115001 in words is "one billion, two hundred million, one hundred fifteen thousand, one".