1378263 has 4 divisors (see below), whose sum is σ = 1837688. Its totient is φ = 918840.

The previous prime is 1378253. The next prime is 1378271. The reversal of 1378263 is 3628731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3628731 = 3 ⋅1209577.

It is not a de Polignac number, because 1378263 - 2⁵ = 1378231 is a prime.

It is a D-number.

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 1378263.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378253) 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, 229708 + ... + 229713.

It is an arithmetic number, because the mean of its divisors is an integer number (459422).

2^1378263 is an apocalyptic number.

1378263 is a deficient number, since it is larger than the sum of its proper divisors (459425).

1378263 is an equidigital number, since it uses as much as digits as its factorization.

1378263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459424.

The product of its digits is 6048, while the sum is 30.

The square root of 1378263 is about 1173.9944633600. The cubic root of 1378263 is about 111.2868968219.

The spelling of 1378263 in words is "one million, three hundred seventy-eight thousand, two hundred sixty-three".