1340263 has 4 divisors (see below), whose sum is σ = 1419120. Its totient is φ = 1261408.

The previous prime is 1340243. The next prime is 1340281. The reversal of 1340263 is 3620431.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1340263 - 2¹⁷ = 1209191 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1340263.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39403 + ... + 39436.

It is an arithmetic number, because the mean of its divisors is an integer number (354780).

2^1340263 is an apocalyptic number.

1340263 is a deficient number, since it is larger than the sum of its proper divisors (78857).

1340263 is an equidigital number, since it uses as much as digits as its factorization.

1340263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78856.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 1340263 is about 1157.6972834036. The cubic root of 1340263 is about 110.2545893747.

Adding to 1340263 its reverse (3620431), we get a palindrome (4960694).

The spelling of 1340263 in words is "one million, three hundred forty thousand, two hundred sixty-three".