4242445 has 4 divisors (see below), whose sum is σ = 5090940. Its totient is φ = 3393952.

The previous prime is 4242437. The next prime is 4242449. The reversal of 4242445 is 5442424.

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 2758921 + 1483524 = 1661^2 + 1218^2 .

It is a cyclic number.

It is not a de Polignac number, because 4242445 - 2³ = 4242437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4242449) 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, 424240 + ... + 424249.

It is an arithmetic number, because the mean of its divisors is an integer number (1272735).

Almost surely, 2^4242445 is an apocalyptic number.

It is an amenable number.

4242445 is a deficient number, since it is larger than the sum of its proper divisors (848495).

4242445 is an equidigital number, since it uses as much as digits as its factorization.

4242445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 848494.

The product of its digits is 5120, while the sum is 25.

The square root of 4242445 is about 2059.7196411162. The cubic root of 4242445 is about 161.8845516941.

Adding to 4242445 its reverse (5442424), we get a palindrome (9684869).

The spelling of 4242445 in words is "four million, two hundred forty-two thousand, four hundred forty-five".