10140521 has 2 divisors, whose sum is σ = 10140522. Its totient is φ = 10140520.

The previous prime is 10140511. The next prime is 10140523. The reversal of 10140521 is 12504101.

10140521 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9211225 + 929296 = 3035^2 + 964^2 .

It is a cyclic number.

It is not a de Polignac number, because 10140521 - 2¹⁴ = 10124137 is a prime.

It is a Sophie Germain prime.

Together with 10140523, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10140496 and 10140505.

It is not a weakly prime, because it can be changed into another prime (10140523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5070260 + 5070261.

It is an arithmetic number, because the mean of its divisors is an integer number (5070261).

Almost surely, 2^10140521 is an apocalyptic number.

It is an amenable number.

10140521 is a deficient number, since it is larger than the sum of its proper divisors (1).

10140521 is an equidigital number, since it uses as much as digits as its factorization.

10140521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 10140521 is about 3184.4184712440. The cubic root of 10140521 is about 216.4479230866.

Adding to 10140521 its reverse (12504101), we get a palindrome (22644622).

The spelling of 10140521 in words is "ten million, one hundred forty thousand, five hundred twenty-one".