4045541 has 4 divisors (see below), whose sum is σ = 4283532. Its totient is φ = 3807552.

The previous prime is 4045523. The next prime is 4045549. The reversal of 4045541 is 1455404.

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 1256641 + 2788900 = 1121^2 + 1670^2 .

It is a cyclic number.

It is not a de Polignac number, because 4045541 - 2¹⁰ = 4044517 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4045549) 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, 118970 + ... + 119003.

It is an arithmetic number, because the mean of its divisors is an integer number (1070883).

Almost surely, 2^4045541 is an apocalyptic number.

It is an amenable number.

4045541 is a deficient number, since it is larger than the sum of its proper divisors (237991).

4045541 is a wasteful number, since it uses less digits than its factorization.

4045541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237990.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 4045541 is about 2011.3530271934. The cubic root of 4045541 is about 159.3402651972.

The spelling of 4045541 in words is "four million, forty-five thousand, five hundred forty-one".