10240521 has 4 divisors (see below), whose sum is σ = 13654032. Its totient is φ = 6827012.

The previous prime is 10240519. The next prime is 10240523. The reversal of 10240521 is 12504201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (10240519) and next prime (10240523).

It is a cyclic number.

It is not a de Polignac number, because 10240521 - 2¹ = 10240519 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10240521.

It is not an unprimeable number, because it can be changed into a prime (10240523) 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, 1706751 + ... + 1706756.

It is an arithmetic number, because the mean of its divisors is an integer number (3413508).

Almost surely, 2^10240521 is an apocalyptic number.

It is an amenable number.

10240521 is a deficient number, since it is larger than the sum of its proper divisors (3413511).

10240521 is an equidigital number, since it uses as much as digits as its factorization.

10240521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3413510.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 10240521 is about 3200.0814052146. The cubic root of 10240521 is about 217.1570921078.

Adding to 10240521 its reverse (12504201), we get a palindrome (22744722).

The spelling of 10240521 in words is "ten million, two hundred forty thousand, five hundred twenty-one".