10686321 has 6 divisors (see below), whose sum is σ = 15435810. Its totient is φ = 7124208.

The previous prime is 10686307. The next prime is 10686323. The reversal of 10686321 is 12368601.

10686321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 6426225 + 4260096 = 2535^2 + 2064^2 .

It is not a de Polignac number, because 10686321 - 2¹¹ = 10684273 is a prime.

It is a super-2 number, since 2×10686321² = 228394913030082, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10686323) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 593676 + ... + 593693.

It is an arithmetic number, because the mean of its divisors is an integer number (2572635).

Almost surely, 2^10686321 is an apocalyptic number.

It is an amenable number.

10686321 is a deficient number, since it is larger than the sum of its proper divisors (4749489).

10686321 is a wasteful number, since it uses less digits than its factorization.

10686321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1187375 (or 1187372 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 10686321 is about 3268.9938819154. The cubic root of 10686321 is about 220.2636027593.

The spelling of 10686321 in words is "ten million, six hundred eighty-six thousand, three hundred twenty-one".