3261645 has 12 divisors (see below), whose sum is σ = 5653596. Its totient is φ = 1739520.

The previous prime is 3261641. The next prime is 3261667. The reversal of 3261645 is 5461623.

3261645 is a `hidden beast` number, since 3 + 2 + 616 + 45 = 666.

3261645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1179396 + 2082249 = 1086^2 + 1443^2 .

It is not a de Polignac number, because 3261645 - 2² = 3261641 is a prime.

It is a super-3 number, since 3×3261645³ (a number of 21 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3261641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36196 + ... + 36285.

It is an arithmetic number, because the mean of its divisors is an integer number (471133).

Almost surely, 2^3261645 is an apocalyptic number.

It is an amenable number.

3261645 is a deficient number, since it is larger than the sum of its proper divisors (2391951).

3261645 is a wasteful number, since it uses less digits than its factorization.

3261645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72492 (or 72489 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 3261645 is about 1806.0024916926. The cubic root of 3261645 is about 148.3015067292.

The spelling of 3261645 in words is "three million, two hundred sixty-one thousand, six hundred forty-five".