2157585 has 16 divisors (see below), whose sum is σ = 3495744. Its totient is φ = 1136192.

The previous prime is 2157563. The next prime is 2157587. The reversal of 2157585 is 5857512.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2157585 - 2⁷ = 2157457 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

2157585 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2157587) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 379 + ... + 2111.

It is an arithmetic number, because the mean of its divisors is an integer number (218484).

2^2157585 is an apocalyptic number.

It is an amenable number.

2157585 is a deficient number, since it is larger than the sum of its proper divisors (1338159).

2157585 is a wasteful number, since it uses less digits than its factorization.

2157585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1824.

The product of its digits is 14000, while the sum is 33.

The square root of 2157585 is about 1468.8720162084. The cubic root of 2157585 is about 129.2178878830.

The spelling of 2157585 in words is "two million, one hundred fifty-seven thousand, five hundred eighty-five".