4001545 has 16 divisors (see below), whose sum is σ = 5132160. Its totient is φ = 2984704.

The previous prime is 4001531. The next prime is 4001549. The reversal of 4001545 is 5451004.

4001545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 4001545 - 2¹¹ = 3999497 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (4001549) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 15084 + ... + 15346.

It is an arithmetic number, because the mean of its divisors is an integer number (320760).

Almost surely, 2^4001545 is an apocalyptic number.

It is an amenable number.

4001545 is a deficient number, since it is larger than the sum of its proper divisors (1130615).

4001545 is a wasteful number, since it uses less digits than its factorization.

4001545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 4001545 is about 2000.3862127099. The cubic root of 4001545 is about 158.7605403546.

Adding to 4001545 its reverse (5451004), we get a palindrome (9452549).

The spelling of 4001545 in words is "four million, one thousand, five hundred forty-five".