145225789 has 2 divisors, whose sum is σ = 145225790. Its totient is φ = 145225788.

The previous prime is 145225739. The next prime is 145225799. The reversal of 145225789 is 987522541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137663289 + 7562500 = 11733^2 + 2750^2 .

It is an emirp because it is prime and its reverse (987522541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145225789 - 2⁹ = 145225277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145225739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72612894 + 72612895.

It is an arithmetic number, because the mean of its divisors is an integer number (72612895).

Almost surely, 2^145225789 is an apocalyptic number.

It is an amenable number.

145225789 is a deficient number, since it is larger than the sum of its proper divisors (1).

145225789 is an equidigital number, since it uses as much as digits as its factorization.

145225789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 201600, while the sum is 43.

The square root of 145225789 is about 12050.9663098027. The cubic root of 145225789 is about 525.6313360262.

The spelling of 145225789 in words is "one hundred forty-five million, two hundred twenty-five thousand, seven hundred eighty-nine".