12256520 has 32 divisors (see below), whose sum is σ = 29030400. Its totient is φ = 4644288.

The previous prime is 12256487. The next prime is 12256549. The reversal of 12256520 is 2565221.

12256520 = T₁₃₉ + T₁₄₀ + ... + T₄₂₃.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7304 + ... + 8823.

It is an arithmetic number, because the mean of its divisors is an integer number (907200).

Almost surely, 2^12256520 is an apocalyptic number.

12256520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12256520 is an abundant number, since it is smaller than the sum of its proper divisors (16773880).

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

12256520 is a wasteful number, since it uses less digits than its factorization.

12256520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16157 (or 16153 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 12256520 is about 3500.9313046674. The cubic root of 12256520 is about 230.5627053690.

The spelling of 12256520 in words is "twelve million, two hundred fifty-six thousand, five hundred twenty".