1321018285 has 4 divisors (see below), whose sum is σ = 1585221948. Its totient is φ = 1056814624.

The previous prime is 1321018273. The next prime is 1321018333. The reversal of 1321018285 is 5828101231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5828101231 = 523 ⋅11143597.

It can be written as a sum of positive squares in 2 ways, for example, as 956170084 + 364848201 = 30922^2 + 19101^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321018285 - 2¹⁵ = 1320985517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132101824 + ... + 132101833.

It is an arithmetic number, because the mean of its divisors is an integer number (396305487).

Almost surely, 2^1321018285 is an apocalyptic number.

It is an amenable number.

1321018285 is a deficient number, since it is larger than the sum of its proper divisors (264203663).

1321018285 is an equidigital number, since it uses as much as digits as its factorization.

1321018285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264203662.

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 1321018285 is about 36345.8152336689. The cubic root of 1321018285 is about 1097.2433135516.

The spelling of 1321018285 in words is "one billion, three hundred twenty-one million, eighteen thousand, two hundred eighty-five".