1284555 has 16 divisors (see below), whose sum is σ = 2126880. Its totient is φ = 661248.

The previous prime is 1284553. The next prime is 1284559. The reversal of 1284555 is 5554821.

It is not a de Polignac number, because 1284555 - 2¹ = 1284553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1284551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1042 + ... + 1911.

It is an arithmetic number, because the mean of its divisors is an integer number (132930).

2^1284555 is an apocalyptic number.

1284555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1284555 is a deficient number, since it is larger than the sum of its proper divisors (842325).

1284555 is a wasteful number, since it uses less digits than its factorization.

1284555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2990.

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

The square root of 1284555 is about 1133.3821067936. The cubic root of 1284555 is about 108.7053456515.

The spelling of 1284555 in words is "one million, two hundred eighty-four thousand, five hundred fifty-five".