1280895 has 32 divisors (see below), whose sum is σ = 2557440. Its totient is φ = 531840.

The previous prime is 1280887. The next prime is 1280921. The reversal of 1280895 is 5980821.

It is a happy number.

It is not a de Polignac number, because 1280895 - 2³ = 1280887 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

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, 601 + ... + 1709.

It is an arithmetic number, because the mean of its divisors is an integer number (79920).

2^1280895 is an apocalyptic number.

1280895 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1280895 is a deficient number, since it is larger than the sum of its proper divisors (1276545).

1280895 is a wasteful number, since it uses less digits than its factorization.

1280895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1135.

The product of its (nonzero) digits is 5760, while the sum is 33.

The square root of 1280895 is about 1131.7663186365. The cubic root of 1280895 is about 108.6020050571.

The spelling of 1280895 in words is "one million, two hundred eighty thousand, eight hundred ninety-five".