145189565 has 4 divisors (see below), whose sum is σ = 174227484. Its totient is φ = 116151648.

The previous prime is 145189559. The next prime is 145189567. The reversal of 145189565 is 565981541.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 41434969 + 103754596 = 6437^2 + 10186^2 .

It is a cyclic number.

It is not a de Polignac number, because 145189565 - 2⁴ = 145189549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145189567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14518952 + ... + 14518961.

It is an arithmetic number, because the mean of its divisors is an integer number (43556871).

Almost surely, 2^145189565 is an apocalyptic number.

It is an amenable number.

145189565 is a deficient number, since it is larger than the sum of its proper divisors (29037919).

145189565 is an equidigital number, since it uses as much as digits as its factorization.

145189565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29037918.

The product of its digits is 216000, while the sum is 44.

The square root of 145189565 is about 12049.4632660546. The cubic root of 145189565 is about 525.5876292508.

The spelling of 145189565 in words is "one hundred forty-five million, one hundred eighty-nine thousand, five hundred sixty-five".