145221205 has 8 divisors (see below), whose sum is σ = 179887104. Its totient is φ = 112429200.

The previous prime is 145221203. The next prime is 145221253. The reversal of 145221205 is 502122541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 145221205 - 2¹ = 145221203 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145221203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 468301 + ... + 468610.

It is an arithmetic number, because the mean of its divisors is an integer number (22485888).

Almost surely, 2^145221205 is an apocalyptic number.

It is an amenable number.

145221205 is a deficient number, since it is larger than the sum of its proper divisors (34665899).

145221205 is an equidigital number, since it uses as much as digits as its factorization.

145221205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 936947.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 145221205 is about 12050.7761160848. The cubic root of 145221205 is about 525.6258055131.

Adding to 145221205 its reverse (502122541), we get a palindrome (647343746).

The spelling of 145221205 in words is "one hundred forty-five million, two hundred twenty-one thousand, two hundred five".