10123681 has 4 divisors (see below), whose sum is σ = 10397332. Its totient is φ = 9850032.

The previous prime is 10123669. The next prime is 10123693. The reversal of 10123681 is 18632101.

10123681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18632101 = 769 ⋅24229.

It is an interprime number because it is at equal distance from previous prime (10123669) and next prime (10123693).

It can be written as a sum of positive squares in 2 ways, for example, as 8208225 + 1915456 = 2865^2 + 1384^2 .

It is a cyclic number.

It is not a de Polignac number, because 10123681 - 2⁵ = 10123649 is a prime.

It is a super-2 number, since 2×10123681² = 204977833979522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10123601) 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, 136770 + ... + 136843.

It is an arithmetic number, because the mean of its divisors is an integer number (2599333).

Almost surely, 2^10123681 is an apocalyptic number.

It is an amenable number.

10123681 is a deficient number, since it is larger than the sum of its proper divisors (273651).

10123681 is an equidigital number, since it uses as much as digits as its factorization.

10123681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273650.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 10123681 is about 3181.7732477347. The cubic root of 10123681 is about 216.3280409298.

Adding to 10123681 its reverse (18632101), we get a palindrome (28755782).

The spelling of 10123681 in words is "ten million, one hundred twenty-three thousand, six hundred eighty-one".