145205039 has 4 divisors (see below), whose sum is σ = 165948624. Its totient is φ = 124461456.

The previous prime is 145205033. The next prime is 145205063. The reversal of 145205039 is 930502541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 930502541 = 31 ⋅30016211.

It is not a de Polignac number, because 145205039 - 2¹² = 145200943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145205033) 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, 10371782 + ... + 10371795.

It is an arithmetic number, because the mean of its divisors is an integer number (41487156).

Almost surely, 2^145205039 is an apocalyptic number.

145205039 is a deficient number, since it is larger than the sum of its proper divisors (20743585).

145205039 is an equidigital number, since it uses as much as digits as its factorization.

145205039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20743584.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 145205039 is about 12050.1053522366. The cubic root of 145205039 is about 525.6063005974.

The spelling of 145205039 in words is "one hundred forty-five million, two hundred five thousand, thirty-nine".