12450943261 has 4 divisors (see below), whose sum is σ = 12852586624. Its totient is φ = 12049299900.

The previous prime is 12450943243. The next prime is 12450943279. The reversal of 12450943261 is 16234905421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (12450943243) and next prime (12450943279).

It is a cyclic number.

It is not a de Polignac number, because 12450943261 - 2⁵ = 12450943229 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 12450943261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12450943231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200821635 + ... + 200821696.

It is an arithmetic number, because the mean of its divisors is an integer number (3213146656).

Almost surely, 2^12450943261 is an apocalyptic number.

It is an amenable number.

12450943261 is a deficient number, since it is larger than the sum of its proper divisors (401643363).

12450943261 is an equidigital number, since it uses as much as digits as its factorization.

12450943261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401643362.

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 12450943261 in words is "twelve billion, four hundred fifty million, nine hundred forty-three thousand, two hundred sixty-one".