12256530 has 64 divisors (see below), whose sum is σ = 34570368. Its totient is φ = 2741760.

The previous prime is 12256487. The next prime is 12256549. The reversal of 12256530 is 3565221.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12256530.

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, 2862 + ... + 5718.

It is an arithmetic number, because the mean of its divisors is an integer number (540162).

Almost surely, 2^12256530 is an apocalyptic number.

12256530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12256530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17285184).

12256530 is an abundant number, since it is smaller than the sum of its proper divisors (22313838).

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

12256530 is a wasteful number, since it uses less digits than its factorization.

12256530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2891.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 12256530 is about 3500.9327328585. The cubic root of 12256530 is about 230.5627680738.

The spelling of 12256530 in words is "twelve million, two hundred fifty-six thousand, five hundred thirty".