1280275 has 12 divisors (see below), whose sum is σ = 1609272. Its totient is φ = 1010240.

The previous prime is 1280267. The next prime is 1280281. The reversal of 1280275 is 5720821.

1280275 = T₁₄₆ + T₁₄₇ + ... + T₂₂₀.

It is not a de Polignac number, because 1280275 - 2³ = 1280267 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1767 + ... + 2383.

It is an arithmetic number, because the mean of its divisors is an integer number (134106).

2^1280275 is an apocalyptic number.

1280275 is a deficient number, since it is larger than the sum of its proper divisors (328997).

1280275 is an equidigital number, since it uses as much as digits as its factorization.

1280275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710 (or 705 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 1280275 is about 1131.4923773495. The cubic root of 1280275 is about 108.5844797825.

The spelling of 1280275 in words is "one million, two hundred eighty thousand, two hundred seventy-five".