1138256 has 20 divisors (see below), whose sum is σ = 2520672. Its totient is φ = 487776.

The previous prime is 1138237. The next prime is 1138273. The reversal of 1138256 is 6528311.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is a congruent 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, 4970 + ... + 5193.

2^1138256 is an apocalyptic number.

1138256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1138256 is an abundant number, since it is smaller than the sum of its proper divisors (1382416).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1138256 is a wasteful number, since it uses less digits than its factorization.

1138256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10178 (or 10172 counting only the distinct ones).

The product of its digits is 1440, while the sum is 26.

The square root of 1138256 is about 1066.8908097833. The cubic root of 1138256 is about 104.4110947629.

The spelling of 1138256 in words is "one million, one hundred thirty-eight thousand, two hundred fifty-six".