10685581 has 4 divisors (see below), whose sum is σ = 11248000. Its totient is φ = 10123164.

The previous prime is 10685579. The next prime is 10685599. The reversal of 10685581 is 18558601.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10685581 - 2¹ = 10685579 is a prime.

It is a super-2 number, since 2×10685581² = 228363282615122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10685551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 281181 + ... + 281218.

It is an arithmetic number, because the mean of its divisors is an integer number (2812000).

Almost surely, 2^10685581 is an apocalyptic number.

It is an amenable number.

10685581 is a deficient number, since it is larger than the sum of its proper divisors (562419).

10685581 is an equidigital number, since it uses as much as digits as its factorization.

10685581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562418.

The product of its (nonzero) digits is 9600, while the sum is 34.

The square root of 10685581 is about 3268.8806952839. The cubic root of 10685581 is about 220.2585184143.

The spelling of 10685581 in words is "ten million, six hundred eighty-five thousand, five hundred eighty-one".