145121189 has 2 divisors, whose sum is σ = 145121190. Its totient is φ = 145121188.

The previous prime is 145121177. The next prime is 145121201. The reversal of 145121189 is 981121541.

It is a balanced prime because it is at equal distance from previous prime (145121177) and next prime (145121201).

It can be written as a sum of positive squares in only one way, i.e., 113592964 + 31528225 = 10658^2 + 5615^2 .

It is a cyclic number.

It is not a de Polignac number, because 145121189 - 2¹⁶ = 145055653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145121149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72560594 + 72560595.

It is an arithmetic number, because the mean of its divisors is an integer number (72560595).

Almost surely, 2^145121189 is an apocalyptic number.

It is an amenable number.

145121189 is a deficient number, since it is larger than the sum of its proper divisors (1).

145121189 is an equidigital number, since it uses as much as digits as its factorization.

145121189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 32.

The square root of 145121189 is about 12046.6256271207. The cubic root of 145121189 is about 525.5051090350.

The spelling of 145121189 in words is "one hundred forty-five million, one hundred twenty-one thousand, one hundred eighty-nine".