145442249 has 2 divisors, whose sum is σ = 145442250. Its totient is φ = 145442248.

The previous prime is 145442237. The next prime is 145442261. The reversal of 145442249 is 942244541.

It is a balanced prime because it is at equal distance from previous prime (145442237) and next prime (145442261).

It can be written as a sum of positive squares in only one way, i.e., 113316025 + 32126224 = 10645^2 + 5668^2 .

It is a cyclic number.

It is not a de Polignac number, because 145442249 - 2⁸ = 145441993 is a prime.

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 (145442149) 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, 72721124 + 72721125.

It is an arithmetic number, because the mean of its divisors is an integer number (72721125).

Almost surely, 2^145442249 is an apocalyptic number.

It is an amenable number.

145442249 is a deficient number, since it is larger than the sum of its proper divisors (1).

145442249 is an equidigital number, since it uses as much as digits as its factorization.

145442249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46080, while the sum is 35.

The square root of 145442249 is about 12059.9439882613. The cubic root of 145442249 is about 525.8923587126.

The spelling of 145442249 in words is "one hundred forty-five million, four hundred forty-two thousand, two hundred forty-nine".