145541441 has 2 divisors, whose sum is σ = 145541442. Its totient is φ = 145541440.

The previous prime is 145541371. The next prime is 145541449. The reversal of 145541441 is 144145541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123121216 + 22420225 = 11096^2 + 4735^2 .

It is an emirp because it is prime and its reverse (144145541) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145541441 is a prime.

It is a super-2 number, since 2×145541441² = 42364622096712962, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (145541449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72770720 + 72770721.

It is an arithmetic number, because the mean of its divisors is an integer number (72770721).

Almost surely, 2^145541441 is an apocalyptic number.

It is an amenable number.

145541441 is a deficient number, since it is larger than the sum of its proper divisors (1).

145541441 is an equidigital number, since it uses as much as digits as its factorization.

145541441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6400, while the sum is 29.

The square root of 145541441 is about 12064.0557442346. The cubic root of 145541441 is about 526.0118848727.

Adding to 145541441 its reverse (144145541), we get a palindrome (289686982).

It can be divided in two parts, 14 and 5541441, that added together give a palindrome (5541455).

The spelling of 145541441 in words is "one hundred forty-five million, five hundred forty-one thousand, four hundred forty-one".