145225122 has 48 divisors (see below), whose sum is σ = 339181920. Its totient is φ = 41332032.

The previous prime is 145225121. The next prime is 145225133. The reversal of 145225122 is 221522541.

It is a junction number, because it is equal to n+sod(n) for n = 145225092 and 145225101.

It is not an unprimeable number, because it can be changed into a prime (145225121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 89454 + ... + 91062.

It is an arithmetic number, because the mean of its divisors is an integer number (7066290).

Almost surely, 2^145225122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 145225122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169590960).

145225122 is an abundant number, since it is smaller than the sum of its proper divisors (193956798).

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

145225122 is a wasteful number, since it uses less digits than its factorization.

145225122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1935 (or 1928 counting only the distinct ones).

The product of its digits is 1600, while the sum is 24.

The square root of 145225122 is about 12050.9386356416. The cubic root of 145225122 is about 525.6305313100.

Adding to 145225122 its reverse (221522541), we get a palindrome (366747663).

The spelling of 145225122 in words is "one hundred forty-five million, two hundred twenty-five thousand, one hundred twenty-two".