145053521 has 2 divisors, whose sum is σ = 145053522. Its totient is φ = 145053520.

The previous prime is 145053487. The next prime is 145053523. The reversal of 145053521 is 125350541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102738496 + 42315025 = 10136^2 + 6505^2 .

It is an emirp because it is prime and its reverse (125350541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145053521 - 2¹⁰ = 145052497 is a prime.

Together with 145053523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (145053523) 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, 72526760 + 72526761.

It is an arithmetic number, because the mean of its divisors is an integer number (72526761).

Almost surely, 2^145053521 is an apocalyptic number.

It is an amenable number.

145053521 is a deficient number, since it is larger than the sum of its proper divisors (1).

145053521 is an equidigital number, since it uses as much as digits as its factorization.

145053521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 145053521 is about 12043.8167123217. The cubic root of 145053521 is about 525.4234177524.

The spelling of 145053521 in words is "one hundred forty-five million, fifty-three thousand, five hundred twenty-one".