1340637512 has 16 divisors (see below), whose sum is σ = 2522645100. Its totient is φ = 667932160.

The previous prime is 1340637509. The next prime is 1340637533. The reversal of 1340637512 is 2157360431.

It can be written as a sum of positive squares in 2 ways, for example, as 1220384356 + 120253156 = 34934^2 + 10966^2 .

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 3 ways as a sum of consecutive naturals, for example, 295937 + ... + 300432.

Almost surely, 2^1340637512 is an apocalyptic number.

It is an amenable number.

1340637512 is a deficient number, since it is larger than the sum of its proper divisors (1182007588).

1340637512 is a wasteful number, since it uses less digits than its factorization.

1340637512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596656 (or 596652 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 1340637512 is about 36614.7171503482. The cubic root of 1340637512 is about 1102.6485796160.

Adding to 1340637512 its reverse (2157360431), we get a palindrome (3497997943).

The spelling of 1340637512 in words is "one billion, three hundred forty million, six hundred thirty-seven thousand, five hundred twelve".