12506240 has 32 divisors (see below), whose sum is σ = 29899260. Its totient is φ = 5002240.

The previous prime is 12506239. The next prime is 12506257. The reversal of 12506240 is 4260521.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11999296 + 506944 = 3464^2 + 712^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable 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, 9131 + ... + 10410.

Almost surely, 2^12506240 is an apocalyptic number.

12506240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12506240 is an abundant number, since it is smaller than the sum of its proper divisors (17393020).

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

12506240 is an equidigital number, since it uses as much as digits as its factorization.

12506240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19560 (or 19548 counting only the distinct ones).

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

The square root of 12506240 is about 3536.4162650910. The cubic root of 12506240 is about 232.1180532755.

Adding to 12506240 its reverse (4260521), we get a palindrome (16766761).

The spelling of 12506240 in words is "twelve million, five hundred six thousand, two hundred forty".