145215349 has 2 divisors, whose sum is σ = 145215350. Its totient is φ = 145215348.

The previous prime is 145215299. The next prime is 145215391. The reversal of 145215349 is 943512541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109872324 + 35343025 = 10482^2 + 5945^2 .

It is a cyclic number.

It is not a de Polignac number, because 145215349 - 2⁷ = 145215221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145215149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72607674 + 72607675.

It is an arithmetic number, because the mean of its divisors is an integer number (72607675).

Almost surely, 2^145215349 is an apocalyptic number.

It is an amenable number.

145215349 is a deficient number, since it is larger than the sum of its proper divisors (1).

145215349 is an equidigital number, since it uses as much as digits as its factorization.

145215349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21600, while the sum is 34.

The square root of 145215349 is about 12050.5331417328. The cubic root of 145215349 is about 525.6187401857.

The spelling of 145215349 in words is "one hundred forty-five million, two hundred fifteen thousand, three hundred forty-nine".