12240525421 has 8 divisors (see below), whose sum is σ = 12390444288. Its totient is φ = 12091170000.

The previous prime is 12240525391. The next prime is 12240525431. The reversal of 12240525421 is 12452504221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12240525421 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12240525421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12240525431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97065 + ... + 184126.

It is an arithmetic number, because the mean of its divisors is an integer number (1548805536).

Almost surely, 2^12240525421 is an apocalyptic number.

It is an amenable number.

12240525421 is a deficient number, since it is larger than the sum of its proper divisors (149918867).

12240525421 is a wasteful number, since it uses less digits than its factorization.

12240525421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281723.

The product of its (nonzero) digits is 6400, while the sum is 28.

The spelling of 12240525421 in words is "twelve billion, two hundred forty million, five hundred twenty-five thousand, four hundred twenty-one".