145720273 has 8 divisors (see below), whose sum is σ = 154423080. Its totient is φ = 137262720.

The previous prime is 145720271. The next prime is 145720279. The reversal of 145720273 is 372027541.

145720273 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 4870849 + 140849424 = 2207^2 + 11868^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 145720273 - 2¹ = 145720271 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145720271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60090 + ... + 62467.

It is an arithmetic number, because the mean of its divisors is an integer number (19302885).

Almost surely, 2^145720273 is an apocalyptic number.

It is an amenable number.

145720273 is a deficient number, since it is larger than the sum of its proper divisors (8702807).

145720273 is a wasteful number, since it uses less digits than its factorization.

145720273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122627.

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 145720273 is about 12071.4652383213. The cubic root of 145720273 is about 526.2272399287.

The spelling of 145720273 in words is "one hundred forty-five million, seven hundred twenty thousand, two hundred seventy-three".