1340985655 has 4 divisors (see below), whose sum is σ = 1609182792. Its totient is φ = 1072788520.

The previous prime is 1340985641. The next prime is 1340985677. The reversal of 1340985655 is 5565890431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5565890431 = 1499 ⋅3713069.

It is not a de Polignac number, because 1340985655 - 2¹⁵ = 1340952887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134098561 + ... + 134098570.

It is an arithmetic number, because the mean of its divisors is an integer number (402295698).

Almost surely, 2^1340985655 is an apocalyptic number.

1340985655 is a deficient number, since it is larger than the sum of its proper divisors (268197137).

1340985655 is an equidigital number, since it uses as much as digits as its factorization.

1340985655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268197136.

The product of its (nonzero) digits is 648000, while the sum is 46.

The square root of 1340985655 is about 36619.4709819790. The cubic root of 1340985655 is about 1102.7440183300.

The spelling of 1340985655 in words is "one billion, three hundred forty million, nine hundred eighty-five thousand, six hundred fifty-five".