1138263 has 16 divisors (see below), whose sum is σ = 1762560. Its totient is φ = 639936.

The previous prime is 1138237. The next prime is 1138273. The reversal of 1138263 is 3628311.

It is a de Polignac number, because none of the positive numbers 2^k-1138263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1003 + ... + 1811.

It is an arithmetic number, because the mean of its divisors is an integer number (110160).

2^1138263 is an apocalyptic number.

1138263 is a deficient number, since it is larger than the sum of its proper divisors (624297).

1138263 is an equidigital number, since it uses as much as digits as its factorization.

1138263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886.

The product of its digits is 864, while the sum is 24.

The square root of 1138263 is about 1066.8940903389. The cubic root of 1138263 is about 104.4113087968.

The spelling of 1138263 in words is "one million, one hundred thirty-eight thousand, two hundred sixty-three".