12511040 has 28 divisors (see below), whose sum is σ = 29792676. Its totient is φ = 5004288.

The previous prime is 12511019. The next prime is 12511043. The reversal of 12511040 is 4011521.

It can be written as a sum of positive squares in 2 ways, for example, as 4804864 + 7706176 = 2192^2 + 2776^2 .

It is a super-2 number, since 2×12511040² = 313052243763200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12511043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19229 + ... + 19868.

Almost surely, 2^12511040 is an apocalyptic number.

12511040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12511040 is an abundant number, since it is smaller than the sum of its proper divisors (17281636).

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

12511040 is an equidigital number, since it uses as much as digits as its factorization.

12511040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39114 (or 39104 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 12511040 is about 3537.0948531245. The cubic root of 12511040 is about 232.1477457635.

Adding to 12511040 its reverse (4011521), we get a palindrome (16522561).

The spelling of 12511040 in words is "twelve million, five hundred eleven thousand, forty".