145556441 has 2 divisors, whose sum is σ = 145556442. Its totient is φ = 145556440.

The previous prime is 145556429. The next prime is 145556447. The reversal of 145556441 is 144655541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83083225 + 62473216 = 9115^2 + 7904^2 .

It is an emirp because it is prime and its reverse (144655541) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145556441 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (145556447) 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 as a sum of consecutive naturals, namely, 72778220 + 72778221.

It is an arithmetic number, because the mean of its divisors is an integer number (72778221).

Almost surely, 2^145556441 is an apocalyptic number.

It is an amenable number.

145556441 is a deficient number, since it is larger than the sum of its proper divisors (1).

145556441 is an equidigital number, since it uses as much as digits as its factorization.

145556441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48000, while the sum is 35.

The square root of 145556441 is about 12064.6774096948. The cubic root of 145556441 is about 526.0299551148.

The spelling of 145556441 in words is "one hundred forty-five million, five hundred fifty-six thousand, four hundred forty-one".