845522 has 4 divisors (see below), whose sum is σ = 1268286. Its totient is φ = 422760.

The previous prime is 845491. The next prime is 845531. The reversal of 845522 is 225548.

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

It can be written as a sum of positive squares in only one way, i.e., 844561 + 961 = 919^2 + 31^2 .

It is a junction number, because it is equal to n+sod(n) for n = 845491 and 845500.

It is an unprimeable number.

845522 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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, 211379 + ... + 211382.

2⁸⁴⁵⁵²² is an apocalyptic number.

845522 is a deficient number, since it is larger than the sum of its proper divisors (422764).

845522 is a wasteful number, since it uses less digits than its factorization.

845522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422763.

The product of its digits is 3200, while the sum is 26.

The square root of 845522 is about 919.5227022755. The cubic root of 845522 is about 94.5601830089.

Adding to 845522 its sum of digits (26), we get a palindrome (845548).

The spelling of 845522 in words is "eight hundred forty-five thousand, five hundred twenty-two".