12511240 has 32 divisors (see below), whose sum is σ = 32172480. Its totient is φ = 4289472.

The previous prime is 12511231. The next prime is 12511271. The reversal of 12511240 is 4211521.

It is a super-2 number, since 2×12511240² = 313062252675200, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 22062 + ... + 22621.

It is an arithmetic number, because the mean of its divisors is an integer number (1005390).

Almost surely, 2^12511240 is an apocalyptic number.

12511240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12511240 is an abundant number, since it is smaller than the sum of its proper divisors (19661240).

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

12511240 is a wasteful number, since it uses less digits than its factorization.

12511240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44701 (or 44697 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 12511240 is about 3537.1231248007. The cubic root of 12511240 is about 232.1489827857.

Adding to 12511240 its reverse (4211521), we get a palindrome (16722761).

The spelling of 12511240 in words is "twelve million, five hundred eleven thousand, two hundred forty".