145273273 has 4 divisors (see below), whose sum is σ = 145343268. Its totient is φ = 145203280.

The previous prime is 145273253. The next prime is 145273309. The reversal of 145273273 is 372372541.

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 128323584 + 16949689 = 11328^2 + 4117^2 .

It is a cyclic number.

It is not a de Polignac number, because 145273273 - 2¹⁷ = 145142201 is a prime.

It is a super-2 number, since 2×145273273² = 42208647696265058, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145273213) by changing a digit.

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, 31786 + ... + 36067.

It is an arithmetic number, because the mean of its divisors is an integer number (36335817).

Almost surely, 2^145273273 is an apocalyptic number.

It is an amenable number.

145273273 is a deficient number, since it is larger than the sum of its proper divisors (69995).

145273273 is an equidigital number, since it uses as much as digits as its factorization.

145273273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69994.

The product of its digits is 35280, while the sum is 34.

The square root of 145273273 is about 12052.9362812553. The cubic root of 145273273 is about 525.6886177684.

The spelling of 145273273 in words is "one hundred forty-five million, two hundred seventy-three thousand, two hundred seventy-three".