1065326621 has 2 divisors, whose sum is σ = 1065326622. Its totient is φ = 1065326620.

The previous prime is 1065326617. The next prime is 1065326683. The reversal of 1065326621 is 1266235601.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 697224025 + 368102596 = 26405^2 + 19186^2 .

It is a cyclic number.

It is not a de Polignac number, because 1065326621 - 2² = 1065326617 is a prime.

It is a super-2 number, since 2×1065326621² = 2269841618822555282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1065326221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 532663310 + 532663311.

It is an arithmetic number, because the mean of its divisors is an integer number (532663311).

Almost surely, 2^1065326621 is an apocalyptic number.

It is an amenable number.

1065326621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1065326621 is an equidigital number, since it uses as much as digits as its factorization.

1065326621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 1065326621 is about 32639.3416140706. The cubic root of 1065326621 is about 1021.3178598750.

The spelling of 1065326621 in words is "one billion, sixty-five million, three hundred twenty-six thousand, six hundred twenty-one".