1652065021 has 2 divisors, whose sum is σ = 1652065022. Its totient is φ = 1652065020.

The previous prime is 1652065007. The next prime is 1652065027. The reversal of 1652065021 is 1205602561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1582925796 + 69139225 = 39786^2 + 8315^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1652065021 is a prime.

It is a super-2 number, since 2×1652065021² = 5458637667223460882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1652065027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 826032510 + 826032511.

It is an arithmetic number, because the mean of its divisors is an integer number (826032511).

Almost surely, 2^1652065021 is an apocalyptic number.

It is an amenable number.

1652065021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1652065021 is an equidigital number, since it uses as much as digits as its factorization.

1652065021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 1652065021 is about 40645.6027264943. The cubic root of 1652065021 is about 1182.1585075016.

Adding to 1652065021 its reverse (1205602561), we get a palindrome (2857667582).

The spelling of 1652065021 in words is "one billion, six hundred fifty-two million, sixty-five thousand, twenty-one".