6181145 has 4 divisors (see below), whose sum is σ = 7417380. Its totient is φ = 4944912.

The previous prime is 6181141. The next prime is 6181151. The reversal of 6181145 is 5411816.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4084441 + 2096704 = 2021^2 + 1448^2 .

It is a cyclic number.

It is not a de Polignac number, because 6181145 - 2² = 6181141 is a prime.

It is a super-2 number, since 2×6181145² = 76413107022050, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6181141) 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 3 ways as a sum of consecutive naturals, for example, 618110 + ... + 618119.

It is an arithmetic number, because the mean of its divisors is an integer number (1854345).

Almost surely, 2^6181145 is an apocalyptic number.

It is an amenable number.

6181145 is a deficient number, since it is larger than the sum of its proper divisors (1236235).

6181145 is a wasteful number, since it uses less digits than its factorization.

6181145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1236234.

The product of its digits is 960, while the sum is 26.

The square root of 6181145 is about 2486.1908615390. The cubic root of 6181145 is about 183.5226382542.

The spelling of 6181145 in words is "six million, one hundred eighty-one thousand, one hundred forty-five".