1281455 has 32 divisors (see below), whose sum is σ = 1935360. Its totient is φ = 794880.

The previous prime is 1281451. The next prime is 1281457. The reversal of 1281455 is 5541821.

It is not a de Polignac number, because 1281455 - 2² = 1281451 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1281451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27242 + ... + 27288.

It is an arithmetic number, because the mean of its divisors is an integer number (60480).

2^1281455 is an apocalyptic number.

1281455 is a deficient number, since it is larger than the sum of its proper divisors (653905).

1281455 is a wasteful number, since it uses less digits than its factorization.

1281455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119.

The product of its digits is 1600, while the sum is 26.

The square root of 1281455 is about 1132.0136924967. The cubic root of 1281455 is about 108.6178294773.

The spelling of 1281455 in words is "one million, two hundred eighty-one thousand, four hundred fifty-five".