4042545 has 16 divisors (see below), whose sum is σ = 6965952. Its totient is φ = 1990080.

The previous prime is 4042543. The next prime is 4042547. The reversal of 4042545 is 5452404.

It is an interprime number because it is at equal distance from previous prime (4042543) and next prime (4042547).

It is not a de Polignac number, because 4042545 - 2¹ = 4042543 is a prime.

It is a nialpdrome in base 14.

It is a zygodrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (4042543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10171 + ... + 10560.

It is an arithmetic number, because the mean of its divisors is an integer number (435372).

Almost surely, 2^4042545 is an apocalyptic number.

It is an amenable number.

4042545 is a deficient number, since it is larger than the sum of its proper divisors (2923407).

4042545 is a wasteful number, since it uses less digits than its factorization.

4042545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20752.

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 4042545 is about 2010.6081169636. The cubic root of 4042545 is about 159.3009213593.

Adding to 4042545 its reverse (5452404), we get a palindrome (9494949).

It can be divided in two parts, 40425 and 45, that added together give a triangular number (40470 = T₂₈₄).

The spelling of 4042545 in words is "four million, forty-two thousand, five hundred forty-five".