9004145 has 4 divisors (see below), whose sum is σ = 10804980. Its totient is φ = 7203312.

The previous prime is 9004111. The next prime is 9004147. The reversal of 9004145 is 5414009.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5414009 = 41 ⋅132049.

It can be written as a sum of positive squares in 2 ways, for example, as 5193841 + 3810304 = 2279^2 + 1952^2 .

It is a cyclic number.

It is not a de Polignac number, because 9004145 - 2⁸ = 9003889 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 9004145.

It is not an unprimeable number, because it can be changed into a prime (9004147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 900410 + ... + 900419.

It is an arithmetic number, because the mean of its divisors is an integer number (2701245).

Almost surely, 2^9004145 is an apocalyptic number.

It is an amenable number.

9004145 is a deficient number, since it is larger than the sum of its proper divisors (1800835).

9004145 is a wasteful number, since it uses less digits than its factorization.

9004145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1800834.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 9004145 is about 3000.6907538099. The cubic root of 9004145 is about 208.0403105428.

The spelling of 9004145 in words is "nine million, four thousand, one hundred forty-five".