1065361921 has 8 divisors (see below), whose sum is σ = 1147574120. Its totient is φ = 983187072.

The previous prime is 1065361907. The next prime is 1065361931. The reversal of 1065361921 is 1291635601.

It can be written as a sum of positive squares in 4 ways, for example, as 163200625 + 902161296 = 12775^2 + 30036^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1065361921 is a prime.

It is a super-2 number, since 2×1065361921² = 2269992045433620482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1065361931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86101 + ... + 97693.

It is an arithmetic number, because the mean of its divisors is an integer number (143446765).

Almost surely, 2^1065361921 is an apocalyptic number.

It is an amenable number.

1065361921 is a deficient number, since it is larger than the sum of its proper divisors (82212199).

1065361921 is a wasteful number, since it uses less digits than its factorization.

1065361921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18675.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 1065361921 is about 32639.8823680478. The cubic root of 1065361921 is about 1021.3291403348.

The spelling of 1065361921 in words is "one billion, sixty-five million, three hundred sixty-one thousand, nine hundred twenty-one".