1340100442 has 8 divisors (see below), whose sum is σ = 2048078196. Its totient is φ = 657407712.

The previous prime is 1340100439. The next prime is 1340100473. The reversal of 1340100442 is 2440010431.

It can be written as a sum of positive squares in 2 ways, for example, as 1284433921 + 55666521 = 35839^2 + 7461^2 .

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 6321123 + ... + 6321334.

Almost surely, 2^1340100442 is an apocalyptic number.

1340100442 is a deficient number, since it is larger than the sum of its proper divisors (707977754).

1340100442 is a wasteful number, since it uses less digits than its factorization.

1340100442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12642512.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1340100442 is about 36607.3823429100. The cubic root of 1340100442 is about 1102.5013166995.

Adding to 1340100442 its reverse (2440010431), we get a palindrome (3780110873).

The spelling of 1340100442 in words is "one billion, three hundred forty million, one hundred thousand, four hundred forty-two".