145422 has 16 divisors (see below), whose sum is σ = 323280. Its totient is φ = 48456.

The previous prime is 145417. The next prime is 145423. The reversal of 145422 is 224541.

It is a super-2 number, since 2×145422² = 42295116168, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 145395 and 145404.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 145422.

It is not an unprimeable number, because it can be changed into a prime (145423) by changing a digit.

145422 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 (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1293 + ... + 1400.

It is an arithmetic number, because the mean of its divisors is an integer number (20205).

2¹⁴⁵⁴²² is an apocalyptic number.

145422 is an abundant number, since it is smaller than the sum of its proper divisors (177858).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145422 is a wasteful number, since it uses less digits than its factorization.

145422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2704 (or 2698 counting only the distinct ones).

The product of its digits is 320, while the sum is 18.

The square root of 145422 is about 381.3423658604. The cubic root of 145422 is about 52.5867952030.

Adding to 145422 its reverse (224541), we get a palindrome (369963).

The spelling of 145422 in words is "one hundred forty-five thousand, four hundred twenty-two".