1201805013 has 8 divisors (see below), whose sum is σ = 1612613728. Its totient is φ = 796099824.

The previous prime is 1201805009. The next prime is 1201805041. The reversal of 1201805013 is 3105081021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1201805013 - 2² = 1201805009 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 (1201805093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1275331 + ... + 1276272.

It is an arithmetic number, because the mean of its divisors is an integer number (201576716).

Almost surely, 2^1201805013 is an apocalyptic number.

It is an amenable number.

1201805013 is a deficient number, since it is larger than the sum of its proper divisors (410808715).

1201805013 is a wasteful number, since it uses less digits than its factorization.

1201805013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2551763.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 1201805013 is about 34667.0594801463. The cubic root of 1201805013 is about 1063.1911112958.

Adding to 1201805013 its reverse (3105081021), we get a palindrome (4306886034).

The spelling of 1201805013 in words is "one billion, two hundred one million, eight hundred five thousand, thirteen".