145441 has 2 divisors, whose sum is σ = 145442. Its totient is φ = 145440.

The previous prime is 145433. The next prime is 145451. The reversal of 145441 is 144541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77841 + 67600 = 279^2 + 260^2 .

It is an emirp because it is prime and its reverse (144541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145441 - 2³ = 145433 is a prime.

It is a Chen prime.

It is equal to p₁₃₄₅₆ and since 145441 and 13456 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (145451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72720 + 72721.

It is an arithmetic number, because the mean of its divisors is an integer number (72721).

2¹⁴⁵⁴⁴¹ is an apocalyptic number.

It is an amenable number.

145441 is a deficient number, since it is larger than the sum of its proper divisors (1).

145441 is an equidigital number, since it uses as much as digits as its factorization.

145441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 320, while the sum is 19.

The square root of 145441 is about 381.3672770441. The cubic root of 145441 is about 52.5890853324.

Adding to 145441 its reverse (144541), we get a palindrome (289982).

Subtracting from 145441 its reverse (144541), we obtain a square (900 = 30²).

The spelling of 145441 in words is "one hundred forty-five thousand, four hundred forty-one".