12512240 has 80 divisors (see below), whose sum is σ = 32060448. Its totient is φ = 4512768.

The previous prime is 12512239. The next prime is 12512263. The reversal of 12512240 is 4221521.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×12512240² = 313112299635200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55007 + ... + 55233.

Almost surely, 2^12512240 is an apocalyptic number.

12512240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12512240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16030224).

12512240 is an abundant number, since it is smaller than the sum of its proper divisors (19548208).

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

12512240 is a wasteful number, since it uses less digits than its factorization.

12512240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306 (or 300 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 12512240 is about 3537.2644797923. The cubic root of 12512240 is about 232.1551676988.

Adding to 12512240 its reverse (4221521), we get a palindrome (16733761).

The spelling of 12512240 in words is "twelve million, five hundred twelve thousand, two hundred forty".