442726161 has 4 divisors (see below), whose sum is σ = 590301552. Its totient is φ = 295150772.

The previous prime is 442726157. The next prime is 442726171. The reversal of 442726161 is 161627244.

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 442726161 - 2² = 442726157 is a prime.

It is a super-3 number, since 3×442726161³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (442726171) 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, 73787691 + ... + 73787696.

It is an arithmetic number, because the mean of its divisors is an integer number (147575388).

Almost surely, 2^442726161 is an apocalyptic number.

It is an amenable number.

442726161 is a deficient number, since it is larger than the sum of its proper divisors (147575391).

442726161 is a wasteful number, since it uses less digits than its factorization.

442726161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147575390.

The product of its digits is 16128, while the sum is 33.

The square root of 442726161 is about 21041.0589324777. The cubic root of 442726161 is about 762.1580864614.

The spelling of 442726161 in words is "four hundred forty-two million, seven hundred twenty-six thousand, one hundred sixty-one".