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442041 = 3147347

442041 has 4 divisors (see below), whose sum is σ = 589392. Its totient is φ = 294692.

The previous prime is 442033. The next prime is 442061. The reversal of 442041 is 140244.

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 442041 - 23 = 442033 is a prime.

It is a D-number.

442041 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 442041.

It is not an unprimeable number, because it can be changed into a prime (442031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73671 + ... + 73676.

It is an arithmetic number, because the mean of its divisors is an integer number (147348).

2442041 is an apocalyptic number.

It is an amenable number.

442041 is a deficient number, since it is larger than the sum of its proper divisors (147351).

442041 is a wasteful number, since it uses less digits than its factorization.

442041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147350.

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 442041 is about 664.8616397417. The cubic root of 442041 is about 76.1764712664.

Adding to 442041 its reverse (140244), we get a palindrome (582285).

The spelling of 442041 in words is "four hundred forty-two thousand, forty-one", and thus it is an iban number.

Divisors: 1 3 147347 442041