442493 has 4 divisors (see below), whose sum is σ = 468540. Its totient is φ = 416448.

The previous prime is 442489. The next prime is 442499. The reversal of 442493 is 394244.

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

It can be written as a sum of positive squares in 2 ways, for example, as 158404 + 284089 = 398^2 + 533^2 .

It is a cyclic number.

It is not a de Polignac number, because 442493 - 2² = 442489 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442499) 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, 12998 + ... + 13031.

It is an arithmetic number, because the mean of its divisors is an integer number (117135).

2⁴⁴²⁴⁹³ is an apocalyptic number.

It is an amenable number.

442493 is a deficient number, since it is larger than the sum of its proper divisors (26047).

442493 is a wasteful number, since it uses less digits than its factorization.

442493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26046.

The product of its digits is 3456, while the sum is 26.

The square root of 442493 is about 665.2014732395. The cubic root of 442493 is about 76.2024266535.

The spelling of 442493 in words is "four hundred forty-two thousand, four hundred ninety-three".