4035645 has 12 divisors (see below), whose sum is σ = 6995196. Its totient is φ = 2152320.

The previous prime is 4035641. The next prime is 4035653. The reversal of 4035645 is 5465304.

It can be written as a sum of positive squares in 2 ways, for example, as 2013561 + 2022084 = 1419^2 + 1422^2 .

It is not a de Polignac number, because 4035645 - 2² = 4035641 is a prime.

It is an Ulam number.

4035645 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4035641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44796 + ... + 44885.

It is an arithmetic number, because the mean of its divisors is an integer number (582933).

Almost surely, 2^4035645 is an apocalyptic number.

4035645 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4035645 is a deficient number, since it is larger than the sum of its proper divisors (2959551).

4035645 is a wasteful number, since it uses less digits than its factorization.

4035645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89692 (or 89689 counting only the distinct ones).

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

The square root of 4035645 is about 2008.8914853720. The cubic root of 4035645 is about 159.2102357206.

It can be divided in two parts, 40356 and 45, that added together give a square (40401 = 201²).

The spelling of 4035645 in words is "four million, thirty-five thousand, six hundred forty-five".