145021573 has 2 divisors, whose sum is σ = 145021574. Its totient is φ = 145021572.

The previous prime is 145021549. The next prime is 145021579. The reversal of 145021573 is 375120541.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144793089 + 228484 = 12033^2 + 478^2 .

It is a cyclic number.

It is not a de Polignac number, because 145021573 - 2²⁵ = 111467141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145021579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72510786 + 72510787.

It is an arithmetic number, because the mean of its divisors is an integer number (72510787).

Almost surely, 2^145021573 is an apocalyptic number.

It is an amenable number.

145021573 is a deficient number, since it is larger than the sum of its proper divisors (1).

145021573 is an equidigital number, since it uses as much as digits as its factorization.

145021573 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 145021573 is about 12042.4903155452. The cubic root of 145021573 is about 525.3848401300.

The spelling of 145021573 in words is "one hundred forty-five million, twenty-one thousand, five hundred seventy-three".