145822 has 4 divisors (see below), whose sum is σ = 218736. Its totient is φ = 72910.

The previous prime is 145819. The next prime is 145823. The reversal of 145822 is 228541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 228541 = 449 ⋅509.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 145793 and 145802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36454 + ... + 36457.

It is an arithmetic number, because the mean of its divisors is an integer number (54684).

2¹⁴⁵⁸²² is an apocalyptic number.

145822 is a deficient number, since it is larger than the sum of its proper divisors (72914).

145822 is an equidigital number, since it uses as much as digits as its factorization.

145822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72913.

The product of its digits is 640, while the sum is 22.

The square root of 145822 is about 381.8664688081. The cubic root of 145822 is about 52.6349664136.

The spelling of 145822 in words is "one hundred forty-five thousand, eight hundred twenty-two".