1005145 has 8 divisors (see below), whose sum is σ = 1229256. Its totient is φ = 788736.

The previous prime is 1005143. The next prime is 1005161. The reversal of 1005145 is 5415001.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 68121 + 937024 = 261^2 + 968^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1005145 - 2¹ = 1005143 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1005143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1632 + ... + 2161.

It is an arithmetic number, because the mean of its divisors is an integer number (153657).

2^1005145 is an apocalyptic number.

It is an amenable number.

1005145 is a deficient number, since it is larger than the sum of its proper divisors (224111).

1005145 is an equidigital number, since it uses as much as digits as its factorization.

1005145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3851.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 1005145 is about 1002.5691996067. The cubic root of 1005145 is about 100.1712067153.

The spelling of 1005145 in words is "one million, five thousand, one hundred forty-five".