256142 has 8 divisors (see below), whose sum is σ = 388800. Its totient is φ = 126544.

The previous prime is 256133. The next prime is 256147. The reversal of 256142 is 241652.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a d-powerful number, because it can be written as 2⁵ + 5⁷ + 1 + 6⁶ + 4⁴ + 2¹⁷ .

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 256142.

It is not an unprimeable number, because it can be changed into a prime (256147) by changing a digit.

256142 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 542 + ... + 897.

It is an arithmetic number, because the mean of its divisors is an integer number (48600).

2²⁵⁶¹⁴² is an apocalyptic number.

256142 is a deficient number, since it is larger than the sum of its proper divisors (132658).

256142 is a wasteful number, since it uses less digits than its factorization.

256142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1530.

The product of its digits is 480, while the sum is 20.

The square root of 256142 is about 506.1047322442. The cubic root of 256142 is about 63.5077800623.

Adding to 256142 its reverse (241652), we get a palindrome (497794).

The spelling of 256142 in words is "two hundred fifty-six thousand, one hundred forty-two".