4197145 has 4 divisors (see below), whose sum is σ = 5036580. Its totient is φ = 3357712.

The previous prime is 4197143. The next prime is 4197161. The reversal of 4197145 is 5417914.

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 2039184 + 2157961 = 1428^2 + 1469^2 .

It is a cyclic number.

It is not a de Polignac number, because 4197145 - 2¹ = 4197143 is a prime.

It is an Ulam number.

4197145 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4197143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 419710 + ... + 419719.

It is an arithmetic number, because the mean of its divisors is an integer number (1259145).

Almost surely, 2^4197145 is an apocalyptic number.

It is an amenable number.

4197145 is a deficient number, since it is larger than the sum of its proper divisors (839435).

4197145 is an equidigital number, since it uses as much as digits as its factorization.

4197145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 839434.

The product of its digits is 5040, while the sum is 31.

The square root of 4197145 is about 2048.6934861028. The cubic root of 4197145 is about 161.3062980714.

The spelling of 4197145 in words is "four million, one hundred ninety-seven thousand, one hundred forty-five".