4042945 has 4 divisors (see below), whose sum is σ = 4851540. Its totient is φ = 3234352.

The previous prime is 4042943. The next prime is 4042967. The reversal of 4042945 is 5492404.

4042945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2547216 + 1495729 = 1596^2 + 1223^2 .

It is a cyclic number.

It is not a de Polignac number, because 4042945 - 2¹ = 4042943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4042943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 404290 + ... + 404299.

It is an arithmetic number, because the mean of its divisors is an integer number (1212885).

Almost surely, 2^4042945 is an apocalyptic number.

It is an amenable number.

4042945 is a deficient number, since it is larger than the sum of its proper divisors (808595).

4042945 is an equidigital number, since it uses as much as digits as its factorization.

4042945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808594.

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

The square root of 4042945 is about 2010.7075868957. The cubic root of 4042945 is about 159.3061753323.

The spelling of 4042945 in words is "four million, forty-two thousand, nine hundred forty-five".