1142256 has 40 divisors (see below), whose sum is σ = 3013200. Its totient is φ = 372736.

The previous prime is 1142243. The next prime is 1142263. The reversal of 1142256 is 6522411.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2320 + ... + 2768.

It is an arithmetic number, because the mean of its divisors is an integer number (75330).

2^1142256 is an apocalyptic number.

1142256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1142256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1506600).

1142256 is an abundant number, since it is smaller than the sum of its proper divisors (1870944).

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

1142256 is a wasteful number, since it uses less digits than its factorization.

1142256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513 (or 507 counting only the distinct ones).

The product of its digits is 480, while the sum is 21.

The square root of 1142256 is about 1068.7637718411. The cubic root of 1142256 is about 104.5332571208.

Adding to 1142256 its reverse (6522411), we get a palindrome (7664667).

The spelling of 1142256 in words is "one million, one hundred forty-two thousand, two hundred fifty-six".