6642145 has 8 divisors (see below), whose sum is σ = 8006760. Its totient is φ = 5289600.

The previous prime is 6642143. The next prime is 6642149. The reversal of 6642145 is 5412466.

It can be written as a sum of positive squares in 4 ways, for example, as 4133089 + 2509056 = 2033^2 + 1584^2 .

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

It is not a de Polignac number, because 6642145 - 2¹ = 6642143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6642143) 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, 1756 + ... + 4045.

It is an arithmetic number, because the mean of its divisors is an integer number (1000845).

Almost surely, 2^6642145 is an apocalyptic number.

It is an amenable number.

6642145 is a deficient number, since it is larger than the sum of its proper divisors (1364615).

6642145 is a wasteful number, since it uses less digits than its factorization.

6642145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6035.

The product of its digits is 5760, while the sum is 28.

The square root of 6642145 is about 2577.2359224565. The cubic root of 6642145 is about 187.9761645502.

It can be divided in two parts, 66421 and 45, that added together give a palindrome (66466).

The spelling of 6642145 in words is "six million, six hundred forty-two thousand, one hundred forty-five".