1285455 has 24 divisors (see below), whose sum is σ = 2208816. Its totient is φ = 636160.

The previous prime is 1285451. The next prime is 1285469. The reversal of 1285455 is 5545821.

It is not a de Polignac number, because 1285455 - 2² = 1285451 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285451) 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 23 ways as a sum of consecutive naturals, for example, 18070 + ... + 18140.

It is an arithmetic number, because the mean of its divisors is an integer number (92034).

2^1285455 is an apocalyptic number.

1285455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1285455 is a deficient number, since it is larger than the sum of its proper divisors (923361).

1285455 is an equidigital number, since it uses as much as digits as its factorization.

1285455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167 (or 96 counting only the distinct ones).

The product of its digits is 8000, while the sum is 30.

The square root of 1285455 is about 1133.7790790097. The cubic root of 1285455 is about 108.7307271964.

The spelling of 1285455 in words is "one million, two hundred eighty-five thousand, four hundred fifty-five".