10240409 has 4 divisors (see below), whose sum is σ = 10842804. Its totient is φ = 9638016.

The previous prime is 10240397. The next prime is 10240423. The reversal of 10240409 is 90404201.

10240409 is digitally balanced in base 3, 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: 90404201 = 163 ⋅554627.

It can be written as a sum of positive squares in 2 ways, for example, as 7590025 + 2650384 = 2755^2 + 1628^2 .

It is a cyclic number.

It is not a de Polignac number, because 10240409 - 2¹⁶ = 10174873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (10240469) 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, 301172 + ... + 301205.

It is an arithmetic number, because the mean of its divisors is an integer number (2710701).

Almost surely, 2^10240409 is an apocalyptic number.

It is an amenable number.

10240409 is a deficient number, since it is larger than the sum of its proper divisors (602395).

10240409 is an equidigital number, since it uses as much as digits as its factorization.

10240409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602394.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 10240409 is about 3200.0639056119. The cubic root of 10240409 is about 217.1563004266.

The spelling of 10240409 in words is "ten million, two hundred forty thousand, four hundred nine".