201306861 has 12 divisors (see below), whose sum is σ = 332316192. Its totient is φ = 115032456.

The previous prime is 201306851. The next prime is 201306883. The reversal of 201306861 is 168603102.

It is not a de Polignac number, because 201306861 - 2⁷ = 201306733 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201306821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1597611 + ... + 1597736.

It is an arithmetic number, because the mean of its divisors is an integer number (27693016).

Almost surely, 2^201306861 is an apocalyptic number.

201306861 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

201306861 is a deficient number, since it is larger than the sum of its proper divisors (131009331).

201306861 is a wasteful number, since it uses less digits than its factorization.

201306861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3195360 (or 3195357 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 201306861 is about 14188.2649044906. The cubic root of 201306861 is about 586.0745448700.

Adding to 201306861 its reverse (168603102), we get a palindrome (369909963).

The spelling of 201306861 in words is "two hundred one million, three hundred six thousand, eight hundred sixty-one".