442471 has 4 divisors (see below), whose sum is σ = 443944. Its totient is φ = 441000.

The previous prime is 442469. The next prime is 442487. The reversal of 442471 is 174244.

It is a semiprime because it is the product of two primes.

It is a 3-Lehmer number, since φ(442471) divides (442471-1)³.

It is a cyclic number.

It is not a de Polignac number, because 442471 - 2¹ = 442469 is a prime.

It is a super-3 number, since 3×442471³ = 259881694792959333, which contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442171) 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, 105 + ... + 946.

It is an arithmetic number, because the mean of its divisors is an integer number (110986).

2⁴⁴²⁴⁷¹ is an apocalyptic number.

442471 is the 421-st heptagonal number.

442471 is a deficient number, since it is larger than the sum of its proper divisors (1473).

442471 is a wasteful number, since it uses less digits than its factorization.

442471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1472.

The product of its digits is 896, while the sum is 22.

The square root of 442471 is about 665.1849366905. The cubic root of 442471 is about 76.2011637475.

The spelling of 442471 in words is "four hundred forty-two thousand, four hundred seventy-one", and thus it is an iban number.