1345512309 has 8 divisors (see below), whose sum is σ = 1801920480. Its totient is φ = 893056176.

The previous prime is 1345512307. The next prime is 1345512349. The reversal of 1345512309 is 9032155431.

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

It is not a de Polignac number, because 1345512309 - 2¹ = 1345512307 is a prime.

It is a super-2 number, since 2×1345512309² = 3620806747341022962, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1345512309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1345512307) 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, 987214 + ... + 988575.

It is an arithmetic number, because the mean of its divisors is an integer number (225240060).

Almost surely, 2^1345512309 is an apocalyptic number.

It is an amenable number.

1345512309 is a deficient number, since it is larger than the sum of its proper divisors (456408171).

1345512309 is a wasteful number, since it uses less digits than its factorization.

1345512309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1976019.

The product of its (nonzero) digits is 16200, while the sum is 33.

The square root of 1345512309 is about 36681.2255656760. The cubic root of 1345512309 is about 1103.9834385971.

The spelling of 1345512309 in words is "one billion, three hundred forty-five million, five hundred twelve thousand, three hundred nine".