4071645 has 12 divisors (see below), whose sum is σ = 7057596. Its totient is φ = 2171520.

The previous prime is 4071601. The next prime is 4071647. The reversal of 4071645 is 5461704.

It can be written as a sum of positive squares in 2 ways, for example, as 820836 + 3250809 = 906^2 + 1803^2 .

It is not a de Polignac number, because 4071645 - 2¹⁰ = 4070621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4071647) 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, 45196 + ... + 45285.

It is an arithmetic number, because the mean of its divisors is an integer number (588133).

Almost surely, 2^4071645 is an apocalyptic number.

4071645 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4071645 is a deficient number, since it is larger than the sum of its proper divisors (2985951).

4071645 is a wasteful number, since it uses less digits than its factorization.

4071645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90492 (or 90489 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 4071645 is about 2017.8317571096. The cubic root of 4071645 is about 159.6822469783.

The spelling of 4071645 in words is "four million, seventy-one thousand, six hundred forty-five".