1280055 has 32 divisors (see below), whose sum is σ = 2386944. Its totient is φ = 573696.

The previous prime is 1280023. The next prime is 1280101. The reversal of 1280055 is 5500821.

It is not a de Polignac number, because 1280055 - 2⁵ = 1280023 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7582 + ... + 7748.

It is an arithmetic number, because the mean of its divisors is an integer number (74592).

2^1280055 is an apocalyptic number.

1280055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1280055 is a deficient number, since it is larger than the sum of its proper divisors (1106889).

1280055 is a wasteful number, since it uses less digits than its factorization.

1280055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 1280055 is about 1131.3951564330. The cubic root of 1280055 is about 108.5782597766.

Adding to 1280055 its reverse (5500821), we get a palindrome (6780876).

The spelling of 1280055 in words is "one million, two hundred eighty thousand, fifty-five".