4042661 has 4 divisors (see below), whose sum is σ = 4620192. Its totient is φ = 3465132.

The previous prime is 4042639. The next prime is 4042673. The reversal of 4042661 is 1662404.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4042661 - 2¹⁴ = 4026277 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 (4042601) 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, 288755 + ... + 288768.

It is an arithmetic number, because the mean of its divisors is an integer number (1155048).

Almost surely, 2^4042661 is an apocalyptic number.

It is an amenable number.

4042661 is a deficient number, since it is larger than the sum of its proper divisors (577531).

4042661 is an equidigital number, since it uses as much as digits as its factorization.

4042661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577530.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 4042661 is about 2010.6369637505. The cubic root of 4042661 is about 159.3024450471.

It can be divided in two parts, 4042 and 661, that multiplied together give a palindrome (2671762).

The spelling of 4042661 in words is "four million, forty-two thousand, six hundred sixty-one".