442156243 has 8 divisors (see below), whose sum is σ = 464903280. Its totient is φ = 419909280.

The previous prime is 442156223. The next prime is 442156291. The reversal of 442156243 is 342651244.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 442156243 - 2¹³ = 442148051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442156223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123205 + ... + 126742.

It is an arithmetic number, because the mean of its divisors is an integer number (58112910).

Almost surely, 2^442156243 is an apocalyptic number.

442156243 is a deficient number, since it is larger than the sum of its proper divisors (22747037).

442156243 is a wasteful number, since it uses less digits than its factorization.

442156243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250037.

The product of its digits is 23040, while the sum is 31.

The square root of 442156243 is about 21027.5115741259. The cubic root of 442156243 is about 761.8309059376.

The spelling of 442156243 in words is "four hundred forty-two million, one hundred fifty-six thousand, two hundred forty-three".