3686545 has 4 divisors (see below), whose sum is σ = 4423860. Its totient is φ = 2949232.

The previous prime is 3686537. The next prime is 3686549. The reversal of 3686545 is 5456863.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 478864 + 3207681 = 692^2 + 1791^2 .

It is a cyclic number.

It is not a de Polignac number, because 3686545 - 2³ = 3686537 is a prime.

It is a super-2 number, since 2×3686545² = 27181228074050, which contains 22 as substring.

It is a d-powerful number, because it can be written as 3¹³ + 6² + 8⁶ + 6³ + 5⁸ + 4¹⁰ + 5⁸ .

It is not an unprimeable number, because it can be changed into a prime (3686549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 368650 + ... + 368659.

It is an arithmetic number, because the mean of its divisors is an integer number (1105965).

Almost surely, 2^3686545 is an apocalyptic number.

It is an amenable number.

3686545 is a deficient number, since it is larger than the sum of its proper divisors (737315).

3686545 is an equidigital number, since it uses as much as digits as its factorization.

3686545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737314.

The product of its digits is 86400, while the sum is 37.

The square root of 3686545 is about 1920.0377600454. The cubic root of 3686545 is about 154.4803269149.

The spelling of 3686545 in words is "three million, six hundred eighty-six thousand, five hundred forty-five".