1280855127 has 4 divisors (see below), whose sum is σ = 1707806840. Its totient is φ = 853903416.

The previous prime is 1280855099. The next prime is 1280855137. The reversal of 1280855127 is 7215580821.

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

It is not a de Polignac number, because 1280855127 - 2⁸ = 1280854871 is a prime.

It is a super-2 number, since 2×1280855127² = 3281179712724372258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280855137) 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, 213475852 + ... + 213475857.

It is an arithmetic number, because the mean of its divisors is an integer number (426951710).

Almost surely, 2^1280855127 is an apocalyptic number.

1280855127 is a deficient number, since it is larger than the sum of its proper divisors (426951713).

1280855127 is an equidigital number, since it uses as much as digits as its factorization.

1280855127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426951712.

The product of its (nonzero) digits is 44800, while the sum is 39.

The square root of 1280855127 is about 35789.0364078163. The cubic root of 1280855127 is about 1086.0087815426.

The spelling of 1280855127 in words is "one billion, two hundred eighty million, eight hundred fifty-five thousand, one hundred twenty-seven".