145784273 has 4 divisors (see below), whose sum is σ = 146022708. Its totient is φ = 145545840.

The previous prime is 145784251. The next prime is 145784279. The reversal of 145784273 is 372487541.

145784273 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 5053504 + 140730769 = 2248^2 + 11863^2 .

It is a cyclic number.

It is not a de Polignac number, because 145784273 - 2¹⁸ = 145522129 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 145784273.

It is not an unprimeable number, because it can be changed into a prime (145784279) 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, 118298 + ... + 119523.

It is an arithmetic number, because the mean of its divisors is an integer number (36505677).

Almost surely, 2^145784273 is an apocalyptic number.

It is an amenable number.

145784273 is a deficient number, since it is larger than the sum of its proper divisors (238435).

145784273 is an equidigital number, since it uses as much as digits as its factorization.

145784273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238434.

The product of its digits is 188160, while the sum is 41.

The square root of 145784273 is about 12074.1158268421. The cubic root of 145784273 is about 526.3042679069.

The spelling of 145784273 in words is "one hundred forty-five million, seven hundred eighty-four thousand, two hundred seventy-three".