4375645 has 4 divisors (see below), whose sum is σ = 5250780. Its totient is φ = 3500512.

The previous prime is 4375639. The next prime is 4375649. The reversal of 4375645 is 5465734.

It is a happy number.

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 1692601 + 2683044 = 1301^2 + 1638^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4375645 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4375645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4375649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 437560 + ... + 437569.

It is an arithmetic number, because the mean of its divisors is an integer number (1312695).

Almost surely, 2^4375645 is an apocalyptic number.

It is an amenable number.

4375645 is a deficient number, since it is larger than the sum of its proper divisors (875135).

4375645 is an equidigital number, since it uses as much as digits as its factorization.

4375645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875134.

The product of its digits is 50400, while the sum is 34.

The square root of 4375645 is about 2091.8042451434. The cubic root of 4375645 is about 163.5613525917.

The spelling of 4375645 in words is "four million, three hundred seventy-five thousand, six hundred forty-five".