1284213 has 8 divisors (see below), whose sum is σ = 1956928. Its totient is φ = 733824.

The previous prime is 1284211. The next prime is 1284223. The reversal of 1284213 is 3124821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1284213 - 2¹ = 1284211 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 61153 = 1284213 / (1 + 2 + 8 + 4 + 2 + 1 + 3).

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1284213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1284211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30556 + ... + 30597.

It is an arithmetic number, because the mean of its divisors is an integer number (244616).

2^1284213 is an apocalyptic number.

It is an amenable number.

1284213 is a deficient number, since it is larger than the sum of its proper divisors (672715).

1284213 is an equidigital number, since it uses as much as digits as its factorization.

1284213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61163.

The product of its digits is 384, while the sum is 21.

The square root of 1284213 is about 1133.2312208901. The cubic root of 1284213 is about 108.6956975559.

The spelling of 1284213 in words is "one million, two hundred eighty-four thousand, two hundred thirteen".