1139856 has 20 divisors (see below), whose sum is σ = 2944752. Its totient is φ = 379936.

The previous prime is 1139851. The next prime is 1139861. The reversal of 1139856 is 6589311.

It is an interprime number because it is at equal distance from previous prime (1139851) and next prime (1139861).

It is not an unprimeable number, because it can be changed into a prime (1139851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11826 + ... + 11921.

2^1139856 is an apocalyptic number.

1139856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1139856 is an abundant number, since it is smaller than the sum of its proper divisors (1804896).

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

1139856 is a wasteful number, since it uses less digits than its factorization.

1139856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23758 (or 23752 counting only the distinct ones).

The product of its digits is 6480, while the sum is 33.

The square root of 1139856 is about 1067.6403888951. The cubic root of 1139856 is about 104.4599939963.

The spelling of 1139856 in words is "one million, one hundred thirty-nine thousand, eight hundred fifty-six".