4040145 has 16 divisors (see below), whose sum is σ = 7182720. Its totient is φ = 2154672.

The previous prime is 4040129. The next prime is 4040159. The reversal of 4040145 is 5410404.

It is not a de Polignac number, because 4040145 - 2⁴ = 4040129 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 14829 + ... + 15098.

It is an arithmetic number, because the mean of its divisors is an integer number (448920).

Almost surely, 2^4040145 is an apocalyptic number.

4040145 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4040145 is a deficient number, since it is larger than the sum of its proper divisors (3142575).

4040145 is a wasteful number, since it uses less digits than its factorization.

4040145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29941 (or 29935 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 4040145 is about 2010.0111939987. The cubic root of 4040145 is about 159.2693902408.

Adding to 4040145 its reverse (5410404), we get a palindrome (9450549).

The spelling of 4040145 in words is "four million, forty thousand, one hundred forty-five".