1219585085 has 16 divisors (see below), whose sum is σ = 1485616896. Its totient is φ = 960962688.

The previous prime is 1219585069. The next prime is 1219585109. The reversal of 1219585085 is 5805859121.

It is a cyclic number.

It is not a de Polignac number, because 1219585085 - 2⁴ = 1219585069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 321872 + ... + 325638.

It is an arithmetic number, because the mean of its divisors is an integer number (92851056).

Almost surely, 2^1219585085 is an apocalyptic number.

It is an amenable number.

1219585085 is a deficient number, since it is larger than the sum of its proper divisors (266031811).

1219585085 is an equidigital number, since it uses as much as digits as its factorization.

1219585085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4732.

The product of its (nonzero) digits is 144000, while the sum is 44.

The square root of 1219585085 is about 34922.5583971163. The cubic root of 1219585085 is about 1068.4085828039.

The spelling of 1219585085 in words is "one billion, two hundred nineteen million, five hundred eighty-five thousand, eighty-five".