2143256 has 8 divisors (see below), whose sum is σ = 4018620. Its totient is φ = 1071624.

The previous prime is 2143243. The next prime is 2143259. The reversal of 2143256 is 6523412.

It is a tau number, because it is divible by the number of its divisors (8).

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143259) 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 as a sum of consecutive naturals, namely, 133946 + ... + 133961.

2^2143256 is an apocalyptic number.

It is an amenable number.

2143256 is a deficient number, since it is larger than the sum of its proper divisors (1875364).

2143256 is a wasteful number, since it uses less digits than its factorization.

2143256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267913 (or 267909 counting only the distinct ones).

The product of its digits is 1440, while the sum is 23.

The square root of 2143256 is about 1463.9863387341. The cubic root of 2143256 is about 128.9311974109.

Adding to 2143256 its reverse (6523412), we get a palindrome (8666668).

The spelling of 2143256 in words is "two million, one hundred forty-three thousand, two hundred fifty-six".