1345343121 has 16 divisors (see below), whose sum is σ = 1994656000. Its totient is φ = 896195664.

The previous prime is 1345343119. The next prime is 1345343159. The reversal of 1345343121 is 1213435431.

It is a happy number.

1345343121 is a `hidden beast` number, since 1 + 3 + 4 + 534 + 3 + 121 = 666.

It is not a de Polignac number, because 1345343121 - 2¹ = 1345343119 is a prime.

It is a super-2 number, since 2×1345343121² = 3619896226444041282, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1345343191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17055 + ... + 54603.

It is an arithmetic number, because the mean of its divisors is an integer number (124666000).

Almost surely, 2^1345343121 is an apocalyptic number.

It is an amenable number.

1345343121 is a deficient number, since it is larger than the sum of its proper divisors (649312879).

1345343121 is a wasteful number, since it uses less digits than its factorization.

1345343121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38885 (or 38879 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 1345343121 is about 36678.9192997831. The cubic root of 1345343121 is about 1103.9371641340.

Adding to 1345343121 its reverse (1213435431), we get a palindrome (2558778552).

The spelling of 1345343121 in words is "one billion, three hundred forty-five million, three hundred forty-three thousand, one hundred twenty-one".