1284722 has 4 divisors (see below), whose sum is σ = 1927086. Its totient is φ = 642360.

The previous prime is 1284713. The next prime is 1284737. The reversal of 1284722 is 2274821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2274821 = 17 ⋅133813.

It can be written as a sum of positive squares in only one way, i.e., 923521 + 361201 = 961^2 + 601^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1284691 and 1284700.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 321179 + ... + 321182.

2^1284722 is an apocalyptic number.

1284722 is a deficient number, since it is larger than the sum of its proper divisors (642364).

1284722 is an equidigital number, since it uses as much as digits as its factorization.

1284722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642363.

The product of its digits is 1792, while the sum is 26.

The square root of 1284722 is about 1133.4557776993. The cubic root of 1284722 is about 108.7100562337.

Subtracting 1284722 from its reverse (2274821), we obtain a palindrome (990099).

The spelling of 1284722 in words is "one million, two hundred eighty-four thousand, seven hundred twenty-two".