145343381 has 2 divisors, whose sum is σ = 145343382. Its totient is φ = 145343380.

The previous prime is 145343347. The next prime is 145343441. The reversal of 145343381 is 183343541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126202756 + 19140625 = 11234^2 + 4375^2 .

It is a cyclic number.

It is not a de Polignac number, because 145343381 - 2²⁶ = 78234517 is a prime.

It is a super-2 number, since 2×145343381² = 42249396801022322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145343281) 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, 72671690 + 72671691.

It is an arithmetic number, because the mean of its divisors is an integer number (72671691).

Almost surely, 2^145343381 is an apocalyptic number.

It is an amenable number.

145343381 is a deficient number, since it is larger than the sum of its proper divisors (1).

145343381 is an equidigital number, since it uses as much as digits as its factorization.

145343381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 32.

The square root of 145343381 is about 12055.8442674082. The cubic root of 145343381 is about 525.7731688809.

The spelling of 145343381 in words is "one hundred forty-five million, three hundred forty-three thousand, three hundred eighty-one".