442780141 has 4 divisors (see below), whose sum is σ = 442828512. Its totient is φ = 442731772.

The previous prime is 442780111. The next prime is 442780193. The reversal of 442780141 is 141087244.

It is a happy number.

It is the 8591-st star 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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 442780141 - 2⁵ = 442780109 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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 (442780111) 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, 5791 + ... + 30316.

It is an arithmetic number, because the mean of its divisors is an integer number (110707128).

Almost surely, 2^442780141 is an apocalyptic number.

It is an amenable number.

442780141 is a deficient number, since it is larger than the sum of its proper divisors (48371).

442780141 is a wasteful number, since it uses less digits than its factorization.

442780141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48370.

The product of its (nonzero) digits is 7168, while the sum is 31.

The square root of 442780141 is about 21042.3416234981. The cubic root of 442780141 is about 762.1890609291.

The spelling of 442780141 in words is "four hundred forty-two million, seven hundred eighty thousand, one hundred forty-one".