3645005 has 16 divisors (see below), whose sum is σ = 5384064. Its totient is φ = 2306880.

The previous prime is 3644999. The next prime is 3645007. The reversal of 3645005 is 5005463.

It is not a de Polignac number, because 3645005 - 2¹² = 3640909 is a prime.

It is a super-2 number, since 2×3645005² = 26572122900050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3645007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3551 + ... + 4460.

It is an arithmetic number, because the mean of its divisors is an integer number (336504).

Almost surely, 2^3645005 is an apocalyptic number.

3645005 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3645005 is a deficient number, since it is larger than the sum of its proper divisors (1739059).

3645005 is a wasteful number, since it uses less digits than its factorization.

3645005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8036.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 3645005 is about 1909.1896186602. The cubic root of 3645005 is about 153.8979055703.

It can be divided in two parts, 364500 and 5, that multiplied together give a square (1822500 = 1350²).

The spelling of 3645005 in words is "three million, six hundred forty-five thousand, five".