1345005321 has 8 divisors (see below), whose sum is σ = 1956371424. Its totient is φ = 815154720.

The previous prime is 1345005317. The next prime is 1345005329. The reversal of 1345005321 is 1235005431.

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

It is not a de Polignac number, because 1345005321 - 2² = 1345005317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1345005291 and 1345005300.

It is not an unprimeable number, because it can be changed into a prime (1345005329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20378836 + ... + 20378901.

It is an arithmetic number, because the mean of its divisors is an integer number (244546428).

Almost surely, 2^1345005321 is an apocalyptic number.

1345005321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1345005321 is a deficient number, since it is larger than the sum of its proper divisors (611366103).

1345005321 is a wasteful number, since it uses less digits than its factorization.

1345005321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40757751.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 1345005321 is about 36674.3141858168. The cubic root of 1345005321 is about 1103.8447611418.

The spelling of 1345005321 in words is "one billion, three hundred forty-five million, five thousand, three hundred twenty-one".