4067645 has 4 divisors (see below), whose sum is σ = 4881180. Its totient is φ = 3254112.

The previous prime is 4067639. The next prime is 4067647. The reversal of 4067645 is 5467604.

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 1674436 + 2393209 = 1294^2 + 1547^2 .

It is a cyclic number.

It is not a de Polignac number, because 4067645 - 2⁴ = 4067629 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4067647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 406760 + ... + 406769.

It is an arithmetic number, because the mean of its divisors is an integer number (1220295).

Almost surely, 2^4067645 is an apocalyptic number.

It is an amenable number.

4067645 is a deficient number, since it is larger than the sum of its proper divisors (813535).

4067645 is an equidigital number, since it uses as much as digits as its factorization.

4067645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813534.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 4067645 is about 2016.8403506475. The cubic root of 4067645 is about 159.6299390237.

The spelling of 4067645 in words is "four million, sixty-seven thousand, six hundred forty-five".