10685381 has 6 divisors (see below), whose sum is σ = 12429990. Its totient is φ = 9158856.

The previous prime is 10685377. The next prime is 10685387. The reversal of 10685381 is 18358601.

It can be written as a sum of positive squares in only one way, i.e., 6421156 + 4264225 = 2534^2 + 2065^2 .

It is not a de Polignac number, because 10685381 - 2² = 10685377 is a prime.

It is a super-2 number, since 2×10685381² = 228354734230322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10685387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 108986 + ... + 109083.

It is an arithmetic number, because the mean of its divisors is an integer number (2071665).

Almost surely, 2^10685381 is an apocalyptic number.

It is an amenable number.

10685381 is a deficient number, since it is larger than the sum of its proper divisors (1744609).

10685381 is an equidigital number, since it uses as much as digits as its factorization.

10685381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218083 (or 218076 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 10685381 is about 3268.8501036297. The cubic root of 10685381 is about 220.2571442267.

The spelling of 10685381 in words is "ten million, six hundred eighty-five thousand, three hundred eighty-one".