442115761 has 4 divisors (see below), whose sum is σ = 446247792. Its totient is φ = 437983732.

The previous prime is 442115747. The next prime is 442115789. The reversal of 442115761 is 167511244.

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 442115761 - 2¹³ = 442107569 is a prime.

It is a super-2 number, since 2×442115761² = 390932692249218242, which contains 22 as substring.

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 not an unprimeable number, because it can be changed into a prime (442115711) 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, 2065855 + ... + 2066068.

It is an arithmetic number, because the mean of its divisors is an integer number (111561948).

Almost surely, 2^442115761 is an apocalyptic number.

It is an amenable number.

442115761 is a deficient number, since it is larger than the sum of its proper divisors (4132031).

442115761 is a wasteful number, since it uses less digits than its factorization.

442115761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4132030.

The product of its digits is 6720, while the sum is 31.

The square root of 442115761 is about 21026.5489560222. The cubic root of 442115761 is about 761.8076551973.

The spelling of 442115761 in words is "four hundred forty-two million, one hundred fifteen thousand, seven hundred sixty-one".