1345205645 has 8 divisors (see below), whose sum is σ = 1844853504. Its totient is φ = 922426704.

The previous prime is 1345205639. The next prime is 1345205657. The reversal of 1345205645 is 5465025431.

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

It is a cyclic number.

It is not a de Polignac number, because 1345205645 - 2¹⁰ = 1345204621 is a prime.

It is a super-3 number, since 3×1345205645³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35), and also a Moran number because the ratio is a prime number: 38434447 = 1345205645 / (1 + 3 + 4 + 5 + 2 + 0 + 5 + 6 + 4 + 5).

It is a Duffinian number.

It is a congruent number.

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, 19217189 + ... + 19217258.

It is an arithmetic number, because the mean of its divisors is an integer number (230606688).

Almost surely, 2^1345205645 is an apocalyptic number.

It is an amenable number.

1345205645 is a deficient number, since it is larger than the sum of its proper divisors (499647859).

1345205645 is an equidigital number, since it uses as much as digits as its factorization.

1345205645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38434459.

The product of its (nonzero) digits is 72000, while the sum is 35.

The square root of 1345205645 is about 36677.0452054142. The cubic root of 1345205645 is about 1103.8995603354.

The spelling of 1345205645 in words is "one billion, three hundred forty-five million, two hundred five thousand, six hundred forty-five".