3206640121 has 8 divisors (see below), whose sum is σ = 3253621640. Its totient is φ = 3159741312.

The previous prime is 3206640103. The next prime is 3206640137. The reversal of 3206640121 is 1210466023.

It can be written as a sum of positive squares in 4 ways, for example, as 547794025 + 2658846096 = 23405^2 + 51564^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 3206640121 - 2²⁵ = 3173085689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3206640191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59695 + ... + 99883.

It is an arithmetic number, because the mean of its divisors is an integer number (406702705).

Almost surely, 2^3206640121 is an apocalyptic number.

It is an amenable number.

3206640121 is a deficient number, since it is larger than the sum of its proper divisors (46981519).

3206640121 is a wasteful number, since it uses less digits than its factorization.

3206640121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41355.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 3206640121 is about 56627.2030123332. The cubic root of 3206640121 is about 1474.6311625500.

The spelling of 3206640121 in words is "three billion, two hundred six million, six hundred forty thousand, one hundred twenty-one".