1284397 has 4 divisors (see below), whose sum is σ = 1292256. Its totient is φ = 1276540.

The previous prime is 1284383. The next prime is 1284421. The reversal of 1284397 is 7934821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1284397 - 2¹¹ = 1282349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1284317) 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 3 ways as a sum of consecutive naturals, for example, 3679 + ... + 4012.

It is an arithmetic number, because the mean of its divisors is an integer number (323064).

2^1284397 is an apocalyptic number.

It is an amenable number.

1284397 is a deficient number, since it is larger than the sum of its proper divisors (7859).

1284397 is an equidigital number, since it uses as much as digits as its factorization.

1284397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7858.

The product of its digits is 12096, while the sum is 34.

The square root of 1284397 is about 1133.3124017675. The cubic root of 1284397 is about 108.7008885570.

It can be divided in two parts, 1284 and 397, that added together give a square (1681 = 41²).

The spelling of 1284397 in words is "one million, two hundred eighty-four thousand, three hundred ninety-seven".