1085521 has 2 divisors, whose sum is σ = 1085522. Its totient is φ = 1085520.

The previous prime is 1085509. The next prime is 1085551. The reversal of 1085521 is 1255801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 846400 + 239121 = 920^2 + 489^2 .

It is an emirp because it is prime and its reverse (1255801) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1085521 - 2¹¹ = 1083473 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1085492 and 1085501.

It is not a weakly prime, because it can be changed into another prime (1085551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 542760 + 542761.

It is an arithmetic number, because the mean of its divisors is an integer number (542761).

2^1085521 is an apocalyptic number.

It is an amenable number.

1085521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1085521 is an equidigital number, since it uses as much as digits as its factorization.

1085521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 1085521 is about 1041.8833907880. The cubic root of 1085521 is about 102.7730889401.

The spelling of 1085521 in words is "one million, eighty-five thousand, five hundred twenty-one".