10521439 has 2 divisors, whose sum is σ = 10521440. Its totient is φ = 10521438.

The previous prime is 10521437. The next prime is 10521449. The reversal of 10521439 is 93412501.

10521439 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10521439 - 2¹ = 10521437 is a prime.

It is a super-2 number, since 2×10521439² = 221401357261442, which contains 22 as substring.

Together with 10521437, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10521437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5260719 + 5260720.

It is an arithmetic number, because the mean of its divisors is an integer number (5260720).

Almost surely, 2^10521439 is an apocalyptic number.

10521439 is a deficient number, since it is larger than the sum of its proper divisors (1).

10521439 is an equidigital number, since it uses as much as digits as its factorization.

10521439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 10521439 is about 3243.6767718131. The cubic root of 10521439 is about 219.1248914066.

The spelling of 10521439 in words is "ten million, five hundred twenty-one thousand, four hundred thirty-nine".