1345663442 has 6 divisors (see below), whose sum is σ = 2018572983. Its totient is φ = 672805782.

The previous prime is 1345663411. The next prime is 1345663453. The reversal of 1345663442 is 2443665431.

It can be written as a sum of positive squares in only one way, i.e., 672831721 + 672831721 = 25939^2 + 25939^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=25939.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1345663396 and 1345663405.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 38909 + ... + 64847.

Almost surely, 2^1345663442 is an apocalyptic number.

1345663442 is a deficient number, since it is larger than the sum of its proper divisors (672909541).

1345663442 is an frugal number, since it uses more digits than its factorization.

1345663442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51880 (or 25941 counting only the distinct ones).

The product of its digits is 207360, while the sum is 38.

The square root of 1345663442 is about 36683.2855943957. The cubic root of 1345663442 is about 1104.0247715728.

The spelling of 1345663442 in words is "one billion, three hundred forty-five million, six hundred sixty-three thousand, four hundred forty-two".