1365002021 has 2 divisors, whose sum is σ = 1365002022. Its totient is φ = 1365002020.

The previous prime is 1365002017. The next prime is 1365002027. The reversal of 1365002021 is 1202005631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1280637796 + 84364225 = 35786^2 + 9185^2 .

It is a cyclic number.

It is not a de Polignac number, because 1365002021 - 2² = 1365002017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1365001984 and 1365002002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1365002027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 682501010 + 682501011.

It is an arithmetic number, because the mean of its divisors is an integer number (682501011).

Almost surely, 2^1365002021 is an apocalyptic number.

It is an amenable number.

1365002021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1365002021 is an equidigital number, since it uses as much as digits as its factorization.

1365002021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 1365002021 is about 36945.9337546096. The cubic root of 1365002021 is about 1109.2882976620.

Adding to 1365002021 its reverse (1202005631), we get a palindrome (2567007652).

The spelling of 1365002021 in words is "one billion, three hundred sixty-five million, two thousand, twenty-one".