145531301 has 2 divisors, whose sum is σ = 145531302. Its totient is φ = 145531300.

The previous prime is 145531297. The next prime is 145531333. The reversal of 145531301 is 103135541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85840225 + 59691076 = 9265^2 + 7726^2 .

It is a cyclic number.

It is not a de Polignac number, because 145531301 - 2² = 145531297 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145531381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72765650 + 72765651.

It is an arithmetic number, because the mean of its divisors is an integer number (72765651).

Almost surely, 2^145531301 is an apocalyptic number.

It is an amenable number.

145531301 is a deficient number, since it is larger than the sum of its proper divisors (1).

145531301 is an equidigital number, since it uses as much as digits as its factorization.

145531301 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 145531301 is about 12063.6354802356. The cubic root of 145531301 is about 525.9996686857. Note that the first 3 decimals are identical.

Adding to 145531301 its reverse (103135541), we get a palindrome (248666842).

The spelling of 145531301 in words is "one hundred forty-five million, five hundred thirty-one thousand, three hundred one".