4072645 has 8 divisors (see below), whose sum is σ = 4903704. Its totient is φ = 3247104.

The previous prime is 4072637. The next prime is 4072661. The reversal of 4072645 is 5462704.

4072645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 982081 + 3090564 = 991^2 + 1758^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4072645 - 2³ = 4072637 is a prime.

It is a Duffinian number.

4072645 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 477 + ... + 2893.

It is an arithmetic number, because the mean of its divisors is an integer number (612963).

Almost surely, 2^4072645 is an apocalyptic number.

It is an amenable number.

4072645 is a deficient number, since it is larger than the sum of its proper divisors (831059).

4072645 is a wasteful number, since it uses less digits than its factorization.

4072645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2759.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 4072645 is about 2018.0795326250. The cubic root of 4072645 is about 159.6953186136.

The spelling of 4072645 in words is "four million, seventy-two thousand, six hundred forty-five".