1065415621 has 2 divisors, whose sum is σ = 1065415622. Its totient is φ = 1065415620.

The previous prime is 1065415609. The next prime is 1065415649. The reversal of 1065415621 is 1265145601.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 596043396 + 469372225 = 24414^2 + 21665^2 .

It is a cyclic number.

It is not a de Polignac number, because 1065415621 - 2¹³ = 1065407429 is a prime.

It is a super-2 number, since 2×1065415621² = 2270220890941631282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1065415651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 532707810 + 532707811.

It is an arithmetic number, because the mean of its divisors is an integer number (532707811).

Almost surely, 2^1065415621 is an apocalyptic number.

It is an amenable number.

1065415621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1065415621 is an equidigital number, since it uses as much as digits as its factorization.

1065415621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 1065415621 is about 32640.7049709408. The cubic root of 1065415621 is about 1021.3463002164.

The spelling of 1065415621 in words is "one billion, sixty-five million, four hundred fifteen thousand, six hundred twenty-one".