4001145 has 16 divisors (see below), whose sum is σ = 6446400. Its totient is φ = 2119104.

The previous prime is 4001141. The next prime is 4001147. The reversal of 4001145 is 5411004.

It is not a de Polignac number, because 4001145 - 2² = 4001141 is a prime.

It is a super-2 number, since 2×4001145² = 32018322622050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (4001141) by changing a digit.

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, 1506 + ... + 3204.

It is an arithmetic number, because the mean of its divisors is an integer number (402900).

Almost surely, 2^4001145 is an apocalyptic number.

It is an amenable number.

4001145 is a deficient number, since it is larger than the sum of its proper divisors (2445255).

4001145 is a wasteful number, since it uses less digits than its factorization.

4001145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1864.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 4001145 is about 2000.2862295182. The cubic root of 4001145 is about 158.7552502035.

Adding to 4001145 its reverse (5411004), we get a palindrome (9412149).

The spelling of 4001145 in words is "four million, one thousand, one hundred forty-five".