145451321 has 2 divisors, whose sum is σ = 145451322. Its totient is φ = 145451320.

The previous prime is 145451297. The next prime is 145451351. The reversal of 145451321 is 123154541.

145451321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 140659600 + 4791721 = 11860^2 + 2189^2 .

It is a cyclic number.

It is not a de Polignac number, because 145451321 - 2¹⁴ = 145434937 is a prime.

It is a Chen prime.

It is equal to p_8202554 and since 145451321 and 8202554 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 (145451351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72725660 + 72725661.

It is an arithmetic number, because the mean of its divisors is an integer number (72725661).

Almost surely, 2^145451321 is an apocalyptic number.

It is an amenable number.

145451321 is a deficient number, since it is larger than the sum of its proper divisors (1).

145451321 is an equidigital number, since it uses as much as digits as its factorization.

145451321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2400, while the sum is 26.

The square root of 145451321 is about 12060.3201035462. The cubic root of 145451321 is about 525.9032927118.

The spelling of 145451321 in words is "one hundred forty-five million, four hundred fifty-one thousand, three hundred twenty-one".