12400243241 has 8 divisors (see below), whose sum is σ = 13217790600. Its totient is φ = 11592487168.

The previous prime is 12400243189. The next prime is 12400243279. The reversal of 12400243241 is 14234200421.

It can be written as a sum of positive squares in 4 ways, for example, as 4101762025 + 8298481216 = 64045^2 + 91096^2 .

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-12400243241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12400243291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2445206 + ... + 2450271.

It is an arithmetic number, because the mean of its divisors is an integer number (1652223825).

Almost surely, 2^12400243241 is an apocalyptic number.

It is an amenable number.

12400243241 is a deficient number, since it is larger than the sum of its proper divisors (817547359).

12400243241 is a wasteful number, since it uses less digits than its factorization.

12400243241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4895643.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 12400243241 its reverse (14234200421), we get a palindrome (26634443662).

The spelling of 12400243241 in words is "twelve billion, four hundred million, two hundred forty-three thousand, two hundred forty-one".