4003745 has 8 divisors (see below), whose sum is σ = 4818984. Its totient is φ = 3193344.

The previous prime is 4003729. The next prime is 4003757. The reversal of 4003745 is 5473004.

It can be written as a sum of positive squares in 4 ways, for example, as 1274641 + 2729104 = 1129^2 + 1652^2 .

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 4003745 - 2⁴ = 4003729 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 4003745.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 977 + ... + 2993.

It is an arithmetic number, because the mean of its divisors is an integer number (602373).

Almost surely, 2^4003745 is an apocalyptic number.

It is an amenable number.

4003745 is a deficient number, since it is larger than the sum of its proper divisors (815239).

4003745 is a wasteful number, since it uses less digits than its factorization.

4003745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2419.

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 4003745 is about 2000.9360309615. The cubic root of 4003745 is about 158.7896298854.

Adding to 4003745 its reverse (5473004), we get a palindrome (9476749).

The spelling of 4003745 in words is "four million, three thousand, seven hundred forty-five".