145344457 has 2 divisors, whose sum is σ = 145344458. Its totient is φ = 145344456.

The previous prime is 145344403. The next prime is 145344469. The reversal of 145344457 is 754443541.

145344457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117158976 + 28185481 = 10824^2 + 5309^2 .

It is a cyclic number.

It is not a de Polignac number, because 145344457 - 2¹¹ = 145342409 is a prime.

It is a super-2 number, since 2×145344457² = 42250022361249698, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (145344557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72672228 + 72672229.

It is an arithmetic number, because the mean of its divisors is an integer number (72672229).

Almost surely, 2^145344457 is an apocalyptic number.

It is an amenable number.

145344457 is a deficient number, since it is larger than the sum of its proper divisors (1).

145344457 is an equidigital number, since it uses as much as digits as its factorization.

145344457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 134400, while the sum is 37.

The square root of 145344457 is about 12055.8888929850. Note that the first 4 decimals coincide. The cubic root of 145344457 is about 525.7744663383.

Adding to 145344457 its reverse (754443541), we get a palindrome (899787998).

The spelling of 145344457 in words is "one hundred forty-five million, three hundred forty-four thousand, four hundred fifty-seven".