1085215129 has 2 divisors, whose sum is σ = 1085215130. Its totient is φ = 1085215128.

The previous prime is 1085215099. The next prime is 1085215189. The reversal of 1085215129 is 9215125801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 959326729 + 125888400 = 30973^2 + 11220^2 .

It is a cyclic number.

It is not a de Polignac number, because 1085215129 - 2¹⁷ = 1085084057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1085215094 and 1085215103.

It is not a weakly prime, because it can be changed into another prime (1085215189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 542607564 + 542607565.

It is an arithmetic number, because the mean of its divisors is an integer number (542607565).

Almost surely, 2^1085215129 is an apocalyptic number.

It is an amenable number.

1085215129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1085215129 is an equidigital number, since it uses as much as digits as its factorization.

1085215129 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 34.

The square root of 1085215129 is about 32942.6035552747. The cubic root of 1085215129 is about 1027.6343512396.

The spelling of 1085215129 in words is "one billion, eighty-five million, two hundred fifteen thousand, one hundred twenty-nine".