4215445 has 8 divisors (see below), whose sum is σ = 5447736. Its totient is φ = 3112896.

The previous prime is 4215443. The next prime is 4215451. The reversal of 4215445 is 5445124.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 306916 + 3908529 = 554^2 + 1977^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 4215445 - 2¹ = 4215443 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4215443) 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, 32362 + ... + 32491.

It is an arithmetic number, because the mean of its divisors is an integer number (680967).

Almost surely, 2^4215445 is an apocalyptic number.

It is an amenable number.

4215445 is a deficient number, since it is larger than the sum of its proper divisors (1232291).

4215445 is a wasteful number, since it uses less digits than its factorization.

4215445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64871.

The product of its digits is 3200, while the sum is 25.

The square root of 4215445 is about 2053.1548894324. The cubic root of 4215445 is about 161.5403957266.

The spelling of 4215445 in words is "four million, two hundred fifteen thousand, four hundred forty-five".