1081263 has 4 divisors (see below), whose sum is σ = 1441688. Its totient is φ = 720840.

The previous prime is 1081247. The next prime is 1081277. The reversal of 1081263 is 3621801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3621801 = 3 ⋅1207267.

It is not a de Polignac number, because 1081263 - 2⁴ = 1081247 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081243) 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, 180208 + ... + 180213.

It is an arithmetic number, because the mean of its divisors is an integer number (360422).

2^1081263 is an apocalyptic number.

1081263 is a deficient number, since it is larger than the sum of its proper divisors (360425).

1081263 is an equidigital number, since it uses as much as digits as its factorization.

1081263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360424.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 1081263 is about 1039.8379681470. The cubic root of 1081263 is about 102.6385356577.

The spelling of 1081263 in words is "one million, eighty-one thousand, two hundred sixty-three".