145345481 has 2 divisors, whose sum is σ = 145345482. Its totient is φ = 145345480.

The previous prime is 145345471. The next prime is 145345507. The reversal of 145345481 is 184543541.

145345481 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., 143616256 + 1729225 = 11984^2 + 1315^2 .

It is a cyclic number.

It is not a de Polignac number, because 145345481 - 2¹⁰ = 145344457 is a prime.

It is a super-2 number, since 2×145345481² = 42250617694242722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (145345411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72672740 + 72672741.

It is an arithmetic number, because the mean of its divisors is an integer number (72672741).

Almost surely, 2^145345481 is an apocalyptic number.

It is an amenable number.

145345481 is a deficient number, since it is larger than the sum of its proper divisors (1).

145345481 is an equidigital number, since it uses as much as digits as its factorization.

145345481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38400, while the sum is 35.

The square root of 145345481 is about 12055.9313617821. The cubic root of 145345481 is about 525.7757010873.

The spelling of 145345481 in words is "one hundred forty-five million, three hundred forty-five thousand, four hundred eighty-one".