1545345273 has 4 divisors (see below), whose sum is σ = 2060460368. Its totient is φ = 1030230180.

The previous prime is 1545345199. The next prime is 1545345311. The reversal of 1545345273 is 3725435451.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1545345273 - 2¹² = 1545341177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1545345073) 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, 257557543 + ... + 257557548.

It is an arithmetic number, because the mean of its divisors is an integer number (515115092).

Almost surely, 2^1545345273 is an apocalyptic number.

It is an amenable number.

1545345273 is a deficient number, since it is larger than the sum of its proper divisors (515115095).

1545345273 is an equidigital number, since it uses as much as digits as its factorization.

1545345273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515115094.

The product of its digits is 252000, while the sum is 39.

The square root of 1545345273 is about 39310.8798298893. The cubic root of 1545345273 is about 1156.1348946901.

It can be divided in two parts, 15453 and 45273, that added together give a triangular number (60726 = T₃₄₈).

The spelling of 1545345273 in words is "one billion, five hundred forty-five million, three hundred forty-five thousand, two hundred seventy-three".