146220145 has 16 divisors (see below), whose sum is σ = 190321488. Its totient is φ = 107407360.

The previous prime is 146220097. The next prime is 146220199. The reversal of 146220145 is 541022641.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 4800481 + 141419664 = 2191^2 + 11892^2 .

It is not a de Polignac number, because 146220145 - 2⁷ = 146220017 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17494 + ... + 24463.

It is an arithmetic number, because the mean of its divisors is an integer number (11895093).

Almost surely, 2^146220145 is an apocalyptic number.

It is an amenable number.

146220145 is a deficient number, since it is larger than the sum of its proper divisors (44101343).

146220145 is a wasteful number, since it uses less digits than its factorization.

146220145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42020.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 146220145 is about 12092.1522071135. The cubic root of 146220145 is about 526.8282682982.

Adding to 146220145 its reverse (541022641), we get a palindrome (687242786).

The spelling of 146220145 in words is "one hundred forty-six million, two hundred twenty thousand, one hundred forty-five".