145520204 has 12 divisors (see below), whose sum is σ = 269640504. Its totient is φ = 68480064.

The previous prime is 145520201. The next prime is 145520209. The reversal of 145520204 is 402025541.

It is a happy number.

It is a super-2 number, since 2×145520204² = 42352259544403232, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 145520204.

It is not an unprimeable number, because it can be changed into a prime (145520201) 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, 1069934 + ... + 1070069.

It is an arithmetic number, because the mean of its divisors is an integer number (22470042).

Almost surely, 2^145520204 is an apocalyptic number.

It is an amenable number.

145520204 is a deficient number, since it is larger than the sum of its proper divisors (124120300).

145520204 is a wasteful number, since it uses less digits than its factorization.

145520204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2140024 (or 2140022 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 145520204 is about 12063.1755354882. The cubic root of 145520204 is about 525.9862989005.

Adding to 145520204 its reverse (402025541), we get a palindrome (547545745).

The spelling of 145520204 in words is "one hundred forty-five million, five hundred twenty thousand, two hundred four".