442154 has 4 divisors (see below), whose sum is σ = 663234.
Its totient is φ = 221076.
The previous prime is 442151. The next prime is 442157. The reversal of 442154 is 451244.
It is a semiprime because it is the product of two primes.
It is an interprime number because it is at equal distance from previous prime (442151) and next prime (442157).
It can be written as a sum of positive squares in only one way, i.e., 390625 + 51529 = 625^2 + 227^2
It is a Curzon number.
It is not an unprimeable number, because it can be changed into a prime (442151) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110537 + ... + 110540.
2442154 is an apocalyptic number.
442154 is a deficient number, since it is larger than the sum of its proper divisors (221080).
442154 is a wasteful number, since it uses less digits than its factorization.
442154 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 221079.
The product of its digits is 640, while the sum is 20.
The square root of 442154 is about 664.9466143985.
The cubic root of 442154 is about 76.1829617713.
Adding to 442154 its reverse (451244), we get a palindrome (893398).
The spelling of 442154 in words is "four hundred forty-two thousand, one hundred fifty-four".