2587685 has 8 divisors (see below), whose sum is σ = 3113880. Its totient is φ = 2064384.

The previous prime is 2587649. The next prime is 2587693. The reversal of 2587685 is 5867852.

It can be written as a sum of positive squares in 4 ways, for example, as 81796 + 2505889 = 286^2 + 1583^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2587685 - 2¹² = 2583589 is a prime.

It is a super-2 number, since 2×2587685² = 13392227318450, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2¹⁴ + 5⁷ + 8⁴ + 7 + 6⁴ + 8⁷ + 5⁸ .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2981 + ... + 3749.

It is an arithmetic number, because the mean of its divisors is an integer number (389235).

2^2587685 is an apocalyptic number.

It is an amenable number.

2587685 is a deficient number, since it is larger than the sum of its proper divisors (526195).

2587685 is an equidigital number, since it uses as much as digits as its factorization.

2587685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1447.

The product of its digits is 134400, while the sum is 41.

The square root of 2587685 is about 1608.6282976499. The cubic root of 2587685 is about 137.2894408124.

The spelling of 2587685 in words is "two million, five hundred eighty-seven thousand, six hundred eighty-five".