145013273 has 4 divisors (see below), whose sum is σ = 146343780. Its totient is φ = 143682768.

The previous prime is 145013261. The next prime is 145013291. The reversal of 145013273 is 372310541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 372310541 = 97 ⋅3838253.

It can be written as a sum of positive squares in 2 ways, for example, as 104919049 + 40094224 = 10243^2 + 6332^2 .

It is a cyclic number.

It is not a de Polignac number, because 145013273 - 2⁸ = 145013017 is a prime.

It is a super-3 number, since 3×145013273³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145013293) 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, 665090 + ... + 665307.

It is an arithmetic number, because the mean of its divisors is an integer number (36585945).

Almost surely, 2^145013273 is an apocalyptic number.

It is an amenable number.

145013273 is a deficient number, since it is larger than the sum of its proper divisors (1330507).

145013273 is a wasteful number, since it uses less digits than its factorization.

145013273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330506.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 145013273 is about 12042.1456975076. The cubic root of 145013273 is about 525.3748168457.

The spelling of 145013273 in words is "one hundred forty-five million, thirteen thousand, two hundred seventy-three".