4045685 has 20 divisors (see below), whose sum is σ = 5680428. Its totient is φ = 2765952.

The previous prime is 4045681. The next prime is 4045687. The reversal of 4045685 is 5865404.

It can be written as a sum of positive squares in 2 ways, for example, as 1270129 + 2775556 = 1127^2 + 1666^2 .

It is not a de Polignac number, because 4045685 - 2² = 4045681 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4045681) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11837 + ... + 12173.

Almost surely, 2^4045685 is an apocalyptic number.

It is an amenable number.

4045685 is a deficient number, since it is larger than the sum of its proper divisors (1634743).

4045685 is an frugal number, since it uses more digits than its factorization.

4045685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370 (or 349 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 32.

The square root of 4045685 is about 2011.3888236738. The cubic root of 4045685 is about 159.3421557335.

The spelling of 4045685 in words is "four million, forty-five thousand, six hundred eighty-five".