1267310005123 has 4 divisors (see below), whose sum is σ = 1272128674608. Its totient is φ = 1262491335640.

The previous prime is 1267310005097. The next prime is 1267310005127. The reversal of 1267310005123 is 3215000137621.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1267310005123 - 2³⁷ = 1129871051651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1267310005127) 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, 2409334348 + ... + 2409334873.

It is an arithmetic number, because the mean of its divisors is an integer number (318032168652).

Almost surely, 2^{1267310005123} is an apocalyptic number.

1267310005123 is a deficient number, since it is larger than the sum of its proper divisors (4818669485).

1267310005123 is an equidigital number, since it uses as much as digits as its factorization.

1267310005123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4818669484.

The product of its (nonzero) digits is 7560, while the sum is 31.

The spelling of 1267310005123 in words is "one trillion, two hundred sixty-seven billion, three hundred ten million, five thousand, one hundred twenty-three".