3205145 has 8 divisors (see below), whose sum is σ = 3882120. Its totient is φ = 2540160.

The previous prime is 3205141. The next prime is 3205217. The reversal of 3205145 is 5415023.

It can be written as a sum of positive squares in 4 ways, for example, as 1038361 + 2166784 = 1019^2 + 1472^2 .

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

It is not a de Polignac number, because 3205145 - 2² = 3205141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3205141) 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, 2396 + ... + 3485.

It is an arithmetic number, because the mean of its divisors is an integer number (485265).

Almost surely, 2^3205145 is an apocalyptic number.

It is an amenable number.

3205145 is a deficient number, since it is larger than the sum of its proper divisors (676975).

3205145 is a wasteful number, since it uses less digits than its factorization.

3205145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5995.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 3205145 is about 1790.2918756449. The cubic root of 3205145 is about 147.4401940822.

The spelling of 3205145 in words is "three million, two hundred five thousand, one hundred forty-five".