1340001345 has 16 divisors (see below), whose sum is σ = 2146518720. Its totient is φ = 713828544.

The previous prime is 1340001343. The next prime is 1340001371. The reversal of 1340001345 is 5431000431.

It is not a de Polignac number, because 1340001345 - 2¹ = 1340001343 is a prime.

It is a super-3 number, since 3×1340001345³ (a number of 28 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1340001343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39114 + ... + 64883.

It is an arithmetic number, because the mean of its divisors is an integer number (134157420).

Almost surely, 2^1340001345 is an apocalyptic number.

1340001345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1340001345 is a deficient number, since it is larger than the sum of its proper divisors (806517375).

1340001345 is a wasteful number, since it uses less digits than its factorization.

1340001345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104864.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 1340001345 is about 36606.0288067417. The cubic root of 1340001345 is about 1102.4741403121.

Adding to 1340001345 its reverse (5431000431), we get a palindrome (6771001776).

The spelling of 1340001345 in words is "one billion, three hundred forty million, one thousand, three hundred forty-five".