145121573 has 2 divisors, whose sum is σ = 145121574. Its totient is φ = 145121572.

The previous prime is 145121567. The next prime is 145121593. The reversal of 145121573 is 375121541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 140968129 + 4153444 = 11873^2 + 2038^2 .

It is a cyclic number.

It is not a de Polignac number, because 145121573 - 2¹⁴ = 145105189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145121593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72560786 + 72560787.

It is an arithmetic number, because the mean of its divisors is an integer number (72560787).

Almost surely, 2^145121573 is an apocalyptic number.

It is an amenable number.

145121573 is a deficient number, since it is larger than the sum of its proper divisors (1).

145121573 is an equidigital number, since it uses as much as digits as its factorization.

145121573 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4200, while the sum is 29.

The square root of 145121573 is about 12046.6415651832. The cubic root of 145121573 is about 525.5055725413.

The spelling of 145121573 in words is "one hundred forty-five million, one hundred twenty-one thousand, five hundred seventy-three".