1145005 has 8 divisors (see below), whose sum is σ = 1393272. Its totient is φ = 903168.

The previous prime is 1145003. The next prime is 1145021. The reversal of 1145005 is 5005411.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 509796 + 635209 = 714^2 + 797^2 .

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

It is a 6-Lehmer number, since φ(1145005) divides (1145005-1)⁶.

It is a cyclic number.

It is not a de Polignac number, because 1145005 - 2¹ = 1145003 is a prime.

It is a super-2 number, since 2×1145005² = 2622072900050, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 1145005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145003) 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 7 ways as a sum of consecutive naturals, for example, 1204 + ... + 1933.

It is an arithmetic number, because the mean of its divisors is an integer number (174159).

2^1145005 is an apocalyptic number.

It is an amenable number.

1145005 is a deficient number, since it is larger than the sum of its proper divisors (248267).

1145005 is an equidigital number, since it uses as much as digits as its factorization.

1145005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3215.

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

The square root of 1145005 is about 1070.0490642957. The cubic root of 1145005 is about 104.6170479423.

The spelling of 1145005 in words is "one million, one hundred forty-five thousand, five".