1340263355 has 4 divisors (see below), whose sum is σ = 1608316032. Its totient is φ = 1072210680.

The previous prime is 1340263339. The next prime is 1340263369. The reversal of 1340263355 is 5533620431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5533620431 = 1229 ⋅4502539.

It is not a de Polignac number, because 1340263355 - 2⁴ = 1340263339 is a prime.

It is a Duffinian 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, 134026331 + ... + 134026340.

It is an arithmetic number, because the mean of its divisors is an integer number (402079008).

Almost surely, 2^1340263355 is an apocalyptic number.

1340263355 is a deficient number, since it is larger than the sum of its proper divisors (268052677).

1340263355 is an equidigital number, since it uses as much as digits as its factorization.

1340263355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268052676.

The product of its (nonzero) digits is 32400, while the sum is 32.

The square root of 1340263355 is about 36609.6074139016. The cubic root of 1340263355 is about 1102.5459910919.

Adding to 1340263355 its reverse (5533620431), we get a palindrome (6873883786).

The spelling of 1340263355 in words is "one billion, three hundred forty million, two hundred sixty-three thousand, three hundred fifty-five".