4003545 has 48 divisors (see below), whose sum is σ = 8043840. Its totient is φ = 1685376.

The previous prime is 4003529. The next prime is 4003577. The reversal of 4003545 is 5453004.

It is a happy number.

It is not a de Polignac number, because 4003545 - 2⁴ = 4003529 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9346 + ... + 9764.

It is an arithmetic number, because the mean of its divisors is an integer number (167580).

Almost surely, 2^4003545 is an apocalyptic number.

It is an amenable number.

4003545 is an abundant number, since it is smaller than the sum of its proper divisors (4040295).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4003545 is a wasteful number, since it uses less digits than its factorization.

4003545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454 (or 447 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 4003545 is about 2000.8860537272. The cubic root of 4003545 is about 158.7869858230.

Adding to 4003545 its reverse (5453004), we get a palindrome (9456549).

The spelling of 4003545 in words is "four million, three thousand, five hundred forty-five".