1320942573 has 20 divisors (see below), whose sum is σ = 1978595388. Its totient is φ = 878247360.

The previous prime is 1320942569. The next prime is 1320942577. The reversal of 1320942573 is 3752490231.

It is an interprime number because it is at equal distance from previous prime (1320942569) and next prime (1320942577).

It can be written as a sum of positive squares in 2 ways, for example, as 815502249 + 505440324 = 28557^2 + 22482^2 .

It is not a de Polignac number, because 1320942573 - 2² = 1320942569 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320942577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 8353 + ... + 52073.

Almost surely, 2^1320942573 is an apocalyptic number.

It is an amenable number.

1320942573 is a deficient number, since it is larger than the sum of its proper divisors (657652815).

1320942573 is an equidigital number, since it uses as much as digits as its factorization.

1320942573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44106 (or 44097 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 1320942573 is about 36344.7736683006. The cubic root of 1320942573 is about 1097.2223509165. Note that the first 3 decimals are identical.

The spelling of 1320942573 in words is "one billion, three hundred twenty million, nine hundred forty-two thousand, five hundred seventy-three".