1320845945 has 8 divisors (see below), whose sum is σ = 1585293120. Its totient is φ = 1056491440.

The previous prime is 1320845927. The next prime is 1320845959. The reversal of 1320845945 is 5495480231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1320845945 - 2⁶ = 1320845881 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13460 + ... + 53130.

It is an arithmetic number, because the mean of its divisors is an integer number (198161640).

Almost surely, 2^1320845945 is an apocalyptic number.

It is an amenable number.

1320845945 is a deficient number, since it is larger than the sum of its proper divisors (264447175).

1320845945 is an equidigital number, since it uses as much as digits as its factorization.

1320845945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46335.

The product of its (nonzero) digits is 172800, while the sum is 41.

The square root of 1320845945 is about 36343.4443194368. Note that the first 3 decimals coincide. The cubic root of 1320845945 is about 1097.1955960348.

The spelling of 1320845945 in words is "one billion, three hundred twenty million, eight hundred forty-five thousand, nine hundred forty-five".