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256602 = 2342767

256602 has 8 divisors (see below), whose sum is σ = 513216. Its totient is φ = 85532.

The previous prime is 256589. The next prime is 256603. The reversal of 256602 is 206652.

256602 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

256602 is an admirable number.

It is an Ulam number.

It is a zygodrome in base 4.

It is not an unprimeable number, because it can be changed into a prime (256603) by changing a digit.

256602 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 3 ways as a sum of consecutive naturals, for example, 21378 + ... + 21389.

It is an arithmetic number, because the mean of its divisors is an integer number (64152).

2256602 is an apocalyptic number.

256602 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

256602 is a wasteful number, since it uses less digits than its factorization.

256602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42772.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 256602 is about 506.5589797842. The cubic root of 256602 is about 63.5457747531.

It can be divided in two parts, 256 and 602, that added together give a palindrome (858).

The spelling of 256602 in words is "two hundred fifty-six thousand, six hundred two".

Divisors: 1 2 3 6 42767 85534 128301 256602