10240081 has 4 divisors (see below), whose sum is σ = 10246500. Its totient is φ = 10233664.

The previous prime is 10240067. The next prime is 10240121. The reversal of 10240081 is 18004201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 18004201 = 571 ⋅31531.

It can be written as a sum of positive squares in 2 ways, for example, as 57600 + 10182481 = 240^2 + 3191^2 .

It is a cyclic number.

It is not a de Polignac number, because 10240081 - 2⁵ = 10240049 is a prime.

It is a super-2 number, since 2×10240081² = 209718517773122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10240781) 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, 1245 + ... + 4693.

It is an arithmetic number, because the mean of its divisors is an integer number (2561625).

Almost surely, 2^10240081 is an apocalyptic number.

It is an amenable number.

10240081 is a deficient number, since it is larger than the sum of its proper divisors (6419).

10240081 is an equidigital number, since it uses as much as digits as its factorization.

10240081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6418.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 10240081 is about 3200.0126562250. The cubic root of 10240081 is about 217.1539818985.

Adding to 10240081 its reverse (18004201), we get a palindrome (28244282).

It can be divided in two parts, 102400 and 81, that multiplied together give a square (8294400 = 2880²).

The spelling of 10240081 in words is "ten million, two hundred forty thousand, eighty-one".