145561265 has 4 divisors (see below), whose sum is σ = 174673524. Its totient is φ = 116449008.

The previous prime is 145561231. The next prime is 145561279. The reversal of 145561265 is 562165541.

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 95335696 + 50225569 = 9764^2 + 7087^2 .

It is a cyclic number.

It is not a de Polignac number, because 145561265 - 2¹⁰ = 145560241 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14556122 + ... + 14556131.

It is an arithmetic number, because the mean of its divisors is an integer number (43668381).

Almost surely, 2^145561265 is an apocalyptic number.

It is an amenable number.

145561265 is a deficient number, since it is larger than the sum of its proper divisors (29112259).

145561265 is an equidigital number, since it uses as much as digits as its factorization.

145561265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29112258.

The product of its digits is 36000, while the sum is 35.

The square root of 145561265 is about 12064.8773304995. The cubic root of 145561265 is about 526.0357662408.

The spelling of 145561265 in words is "one hundred forty-five million, five hundred sixty-one thousand, two hundred sixty-five".