145521149 has 2 divisors, whose sum is σ = 145521150. Its totient is φ = 145521148.

The previous prime is 145521143. The next prime is 145521151. The reversal of 145521149 is 941125541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114105124 + 31416025 = 10682^2 + 5605^2 .

It is a cyclic number.

It is not a de Polignac number, because 145521149 - 2¹⁶ = 145455613 is a prime.

Together with 145521151, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145521143) 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, 72760574 + 72760575.

It is an arithmetic number, because the mean of its divisors is an integer number (72760575).

Almost surely, 2^145521149 is an apocalyptic number.

It is an amenable number.

145521149 is a deficient number, since it is larger than the sum of its proper divisors (1).

145521149 is an equidigital number, since it uses as much as digits as its factorization.

145521149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7200, while the sum is 32.

The square root of 145521149 is about 12063.2147042155. The cubic root of 145521149 is about 525.9874374732.

The spelling of 145521149 in words is "one hundred forty-five million, five hundred twenty-one thousand, one hundred forty-nine".