145121149 has 2 divisors, whose sum is σ = 145121150. Its totient is φ = 145121148.

The previous prime is 145121147. The next prime is 145121159. The reversal of 145121149 is 941121541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132089049 + 13032100 = 11493^2 + 3610^2 .

It is an emirp because it is prime and its reverse (941121541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145121149 - 2¹ = 145121147 is a prime.

Together with 145121147, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145121147) by changing a digit.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72560574 + 72560575.

It is an arithmetic number, because the mean of its divisors is an integer number (72560575).

Almost surely, 2^145121149 is an apocalyptic number.

It is an amenable number.

145121149 is a deficient number, since it is larger than the sum of its proper divisors (1).

145121149 is an equidigital number, since it uses as much as digits as its factorization.

145121149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 28.

The square root of 145121149 is about 12046.6239669046. The cubic root of 145121149 is about 525.5050607530.

The spelling of 145121149 in words is "one hundred forty-five million, one hundred twenty-one thousand, one hundred forty-nine".