256500 has 96 divisors (see below), whose sum is σ = 873600. Its totient is φ = 64800.
The previous prime is 256499. The next prime is 256517. The reversal of 256500 is 5652.
256500 is nontrivially palindromic in base 14.
It is a Harshad number since it is a multiple of its sum of digits (18).
256500 is an undulating number in base 14.
It is a nialpdrome in base 15.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13491 + ... + 13509.
It is an arithmetic number, because the mean of its divisors is an integer number (9100).
2256500 is an apocalyptic number.
256500 is a gapful number since it is divisible by the number (20) 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 256500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (436800).
256500 is an abundant number, since it is smaller than the sum of its proper divisors (617100).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
256500 is a wasteful number, since it uses less digits than its factorization.
256500 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 47 (or 29 counting only the distinct ones).
The product of its (nonzero) digits is 300, while the sum is 18.
The square root of 256500 is about 506.4582904840. The cubic root of 256500 is about 63.5373537638.
The spelling of 256500 in words is "two hundred fifty-six thousand, five hundred".
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