1280253167499 has 4 divisors (see below), whose sum is σ = 1707004223336. Its totient is φ = 853502111664.

The previous prime is 1280253167491. The next prime is 1280253167503. The reversal of 1280253167499 is 9947613520821.

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

It is not a de Polignac number, because 1280253167499 - 2³ = 1280253167491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1280253167491) 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, 213375527914 + ... + 213375527919.

It is an arithmetic number, because the mean of its divisors is an integer number (426751055834).

It is a 1-persistent number, because it is pandigital, but 2⋅1280253167499 = 2560506334998 is not.

Almost surely, 2^{1280253167499} is an apocalyptic number.

1280253167499 is a deficient number, since it is larger than the sum of its proper divisors (426751055837).

1280253167499 is an equidigital number, since it uses as much as digits as its factorization.

1280253167499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426751055836.

The product of its (nonzero) digits is 6531840, while the sum is 57.

The spelling of 1280253167499 in words is "one trillion, two hundred eighty billion, two hundred fifty-three million, one hundred sixty-seven thousand, four hundred ninety-nine".