10686861 has 6 divisors (see below), whose sum is σ = 15436590. Its totient is φ = 7124568.

The previous prime is 10686859. The next prime is 10686887. The reversal of 10686861 is 16868601.

It can be written as a sum of positive squares in only one way, i.e., 10361961 + 324900 = 3219^2 + 570^2 .

It is not a de Polignac number, because 10686861 - 2¹ = 10686859 is a prime.

It is a super-2 number, since 2×10686861² = 228417996066642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10686811) 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, 593706 + ... + 593723.

It is an arithmetic number, because the mean of its divisors is an integer number (2572765).

Almost surely, 2^10686861 is an apocalyptic number.

It is an amenable number.

10686861 is a deficient number, since it is larger than the sum of its proper divisors (4749729).

10686861 is a wasteful number, since it uses less digits than its factorization.

10686861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1187435 (or 1187432 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 10686861 is about 3269.0764750920. The cubic root of 10686861 is about 220.2673128089.

It can be divided in two parts, 106868 and 61, that added together give a square (106929 = 327²).

The spelling of 10686861 in words is "ten million, six hundred eighty-six thousand, eight hundred sixty-one".