1215585 has 48 divisors (see below), whose sum is σ = 2560896. Its totient is φ = 520704.

The previous prime is 1215583. The next prime is 1215587. The reversal of 1215585 is 5855121.

It is an interprime number because it is at equal distance from previous prime (1215583) and next prime (1215587).

It is not a de Polignac number, because 1215585 - 2¹ = 1215583 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1215583) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5242 + ... + 5468.

It is an arithmetic number, because the mean of its divisors is an integer number (53352).

2^1215585 is an apocalyptic number.

1215585 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1215585 is an abundant number, since it is smaller than the sum of its proper divisors (1345311).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1215585 is a wasteful number, since it uses less digits than its factorization.

1215585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262 (or 259 counting only the distinct ones).

The product of its digits is 2000, while the sum is 27.

The square root of 1215585 is about 1102.5357137073. The cubic root of 1215585 is about 106.7239221694.

The spelling of 1215585 in words is "one million, two hundred fifteen thousand, five hundred eighty-five".