145020613 has 4 divisors (see below), whose sum is σ = 145107180. Its totient is φ = 144934048.

The previous prime is 145020599. The next prime is 145020637. The reversal of 145020613 is 316020541.

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 34833604 + 110187009 = 5902^2 + 10497^2 .

It is a cyclic number.

It is not a de Polignac number, because 145020613 - 2⁹ = 145020101 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 (145020713) 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, 40720 + ... + 44137.

It is an arithmetic number, because the mean of its divisors is an integer number (36276795).

Almost surely, 2^145020613 is an apocalyptic number.

It is an amenable number.

145020613 is a deficient number, since it is larger than the sum of its proper divisors (86567).

145020613 is an equidigital number, since it uses as much as digits as its factorization.

145020613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86566.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 145020613 is about 12042.4504566139. The cubic root of 145020613 is about 525.3836808299.

The spelling of 145020613 in words is "one hundred forty-five million, twenty thousand, six hundred thirteen".