1266912420481 has 4 divisors (see below), whose sum is σ = 1310599055700. Its totient is φ = 1223225785264.

The previous prime is 1266912420457. The next prime is 1266912420497. The reversal of 1266912420481 is 1840242196621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1038197966400 + 228714454081 = 1018920^2 + 478241^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1266912420481 is a prime.

It is a super-2 number, since 2×1266912420481² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1266912420181) 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, 21843317566 + ... + 21843317623.

It is an arithmetic number, because the mean of its divisors is an integer number (327649763925).

Almost surely, 2^{1266912420481} is an apocalyptic number.

It is an amenable number.

1266912420481 is a deficient number, since it is larger than the sum of its proper divisors (43686635219).

1266912420481 is an equidigital number, since it uses as much as digits as its factorization.

1266912420481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43686635218.

The product of its (nonzero) digits is 331776, while the sum is 46.

The spelling of 1266912420481 in words is "one trillion, two hundred sixty-six billion, nine hundred twelve million, four hundred twenty thousand, four hundred eighty-one".