3645045 has 12 divisors (see below), whose sum is σ = 6318156. Its totient is φ = 1944000.

The previous prime is 3645013. The next prime is 3645049. The reversal of 3645045 is 5405463.

It can be written as a sum of positive squares in 2 ways, for example, as 2331729 + 1313316 = 1527^2 + 1146^2 .

It is not a de Polignac number, because 3645045 - 2⁵ = 3645013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3645049) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40456 + ... + 40545.

It is an arithmetic number, because the mean of its divisors is an integer number (526513).

Almost surely, 2^3645045 is an apocalyptic number.

It is an amenable number.

3645045 is a deficient number, since it is larger than the sum of its proper divisors (2673111).

3645045 is a wasteful number, since it uses less digits than its factorization.

3645045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81012 (or 81009 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 3645045 is about 1909.2000942803. The cubic root of 3645045 is about 153.8984685227.

The spelling of 3645045 in words is "three million, six hundred forty-five thousand, forty-five".