2006145 has 24 divisors (see below), whose sum is σ = 3517800. Its totient is φ = 1057536.

The previous prime is 2006141. The next prime is 2006159. The reversal of 2006145 is 5416002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 767376 + 1238769 = 876^2 + 1113^2 .

It is not a de Polignac number, because 2006145 - 2² = 2006141 is a prime.

It is a super-2 number, since 2×2006145² = 8049235522050, which contains 22 as substring.

2006145 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2006141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4701 + ... + 5109.

It is an arithmetic number, because the mean of its divisors is an integer number (146575).

2^2006145 is an apocalyptic number.

It is an amenable number.

2006145 is a deficient number, since it is larger than the sum of its proper divisors (1511655).

2006145 is a wasteful number, since it uses less digits than its factorization.

2006145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529 (or 526 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 2006145 is about 1416.3844816998. The cubic root of 2006145 is about 126.1210099735.

The spelling of 2006145 in words is "two million, six thousand, one hundred forty-five".