87422 has 4 divisors (see below), whose sum is σ = 131136. Its totient is φ = 43710.
The previous prime is 87421. The next prime is 87427. The reversal of 87422 is 22478.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22478 = 2 ⋅11239.
It is a plaindrome in base 16.
It is a nialpdrome in base 10.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (87421) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21854 + ... + 21857.
It is an arithmetic number, because the mean of its divisors is an integer number (32784).
287422 is an apocalyptic number.
87422 is a deficient number, since it is larger than the sum of its proper divisors (43714).
87422 is a wasteful number, since it uses less digits than its factorization.
87422 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 43713.
The product of its digits is 896, while the sum is 23.
The square root of 87422 is about 295.6721156957. The cubic root of 87422 is about 44.3820044488.
The spelling of 87422 in words is "eighty-seven thousand, four hundred twenty-two".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.069 sec. • engine limits •