145420441 has 2 divisors, whose sum is σ = 145420442. Its totient is φ = 145420440.

The previous prime is 145420439. The next prime is 145420463. The reversal of 145420441 is 144024541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96825600 + 48594841 = 9840^2 + 6971^2 .

It is a cyclic number.

It is not a de Polignac number, because 145420441 - 2¹ = 145420439 is a prime.

It is a super-2 number, since 2×145420441² = 42294209321268962, which contains 22 as substring.

Together with 145420439, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (145423441) 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, 72710220 + 72710221.

It is an arithmetic number, because the mean of its divisors is an integer number (72710221).

Almost surely, 2^145420441 is an apocalyptic number.

It is an amenable number.

145420441 is a deficient number, since it is larger than the sum of its proper divisors (1).

145420441 is an equidigital number, since it uses as much as digits as its factorization.

145420441 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 145420441 is about 12059.0398042299. The cubic root of 145420441 is about 525.8660728296.

Adding to 145420441 its reverse (144024541), we get a palindrome (289444982).

The spelling of 145420441 in words is "one hundred forty-five million, four hundred twenty thousand, four hundred forty-one".