1163521 has 2 divisors, whose sum is σ = 1163522. Its totient is φ = 1163520.

The previous prime is 1163507. The next prime is 1163543. The reversal of 1163521 is 1253611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1050625 + 112896 = 1025^2 + 336^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1163521 is a prime.

It is a super-2 number, since 2×1163521² = 2707562234882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1163551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 581760 + 581761.

It is an arithmetic number, because the mean of its divisors is an integer number (581761).

2^1163521 is an apocalyptic number.

It is an amenable number.

1163521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1163521 is an equidigital number, since it uses as much as digits as its factorization.

1163521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 180, while the sum is 19.

The square root of 1163521 is about 1078.6663061392. Note that the first 3 decimals coincide. The cubic root of 1163521 is about 105.1779597405.

The spelling of 1163521 in words is "one million, one hundred sixty-three thousand, five hundred twenty-one".