1321616027 has 4 divisors (see below), whose sum is σ = 1329255600. Its totient is φ = 1313976456.

The previous prime is 1321615993. The next prime is 1321616033. The reversal of 1321616027 is 7206161231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7206161231 = 101 ⋅71348131.

It is a cyclic number.

It is not a de Polignac number, because 1321616027 - 2¹² = 1321611931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321616327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3819527 + ... + 3819872.

It is an arithmetic number, because the mean of its divisors is an integer number (332313900).

Almost surely, 2^1321616027 is an apocalyptic number.

1321616027 is a deficient number, since it is larger than the sum of its proper divisors (7639573).

1321616027 is an equidigital number, since it uses as much as digits as its factorization.

1321616027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7639572.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 1321616027 is about 36354.0372861117. The cubic root of 1321616027 is about 1097.4087842650.

Adding to 1321616027 its reverse (7206161231), we get a palindrome (8527777258).

The spelling of 1321616027 in words is "one billion, three hundred twenty-one million, six hundred sixteen thousand, twenty-seven".