1220230145 has 4 divisors (see below), whose sum is σ = 1464276180. Its totient is φ = 976184112.

The previous prime is 1220230127. The next prime is 1220230147. The reversal of 1220230145 is 5410320221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 752459761 + 467770384 = 27431^2 + 21628^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220230145 - 2¹⁶ = 1220164609 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1220230147) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 122023010 + ... + 122023019.

It is an arithmetic number, because the mean of its divisors is an integer number (366069045).

Almost surely, 2^1220230145 is an apocalyptic number.

It is an amenable number.

1220230145 is a deficient number, since it is larger than the sum of its proper divisors (244046035).

1220230145 is an equidigital number, since it uses as much as digits as its factorization.

1220230145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244046034.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1220230145 is about 34931.7927538797. The cubic root of 1220230145 is about 1068.5969162999.

Adding to 1220230145 its reverse (5410320221), we get a palindrome (6630550366).

The spelling of 1220230145 in words is "one billion, two hundred twenty million, two hundred thirty thousand, one hundred forty-five".