1321285 has 12 divisors (see below), whose sum is σ = 1844748. Its totient is φ = 905856.

The previous prime is 1321283. The next prime is 1321289. The reversal of 1321285 is 5821231.

It can be written as a sum of positive squares in 2 ways, for example, as 933156 + 388129 = 966^2 + 623^2 .

It is not a de Polignac number, because 1321285 - 2¹ = 1321283 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 (1321283) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2452 + ... + 2941.

It is an arithmetic number, because the mean of its divisors is an integer number (153729).

2^1321285 is an apocalyptic number.

It is an amenable number.

1321285 is a deficient number, since it is larger than the sum of its proper divisors (523463).

1321285 is an equidigital number, since it uses as much as digits as its factorization.

1321285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5412 (or 5405 counting only the distinct ones).

The product of its digits is 480, while the sum is 22.

The square root of 1321285 is about 1149.4716177444. The cubic root of 1321285 is about 109.7317153447.

The spelling of 1321285 in words is "one million, three hundred twenty-one thousand, two hundred eighty-five".