1043521 has 2 divisors, whose sum is σ = 1043522. Its totient is φ = 1043520.

The previous prime is 1043513. The next prime is 1043531. The reversal of 1043521 is 1253401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 746496 + 297025 = 864^2 + 545^2 .

It is an emirp because it is prime and its reverse (1253401) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1043521 - 2³ = 1043513 is a prime.

1043521 is a lucky number.

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 1043495 and 1043504.

It is not a weakly prime, because it can be changed into another prime (1043501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521760 + 521761.

It is an arithmetic number, because the mean of its divisors is an integer number (521761).

2^1043521 is an apocalyptic number.

It is an amenable number.

1043521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1043521 is an equidigital number, since it uses as much as digits as its factorization.

1043521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 1043521 is about 1021.5287563255. The cubic root of 1043521 is about 101.4301492278.

Subtracting from 1043521 its product of nonzero digits (120), we obtain a palindrome (1043401).

Adding to 1043521 its reverse (1253401), we get a palindrome (2296922).

It can be divided in two parts, 1043 and 521, that multiplied together give a triangular number (543403 = T₁₀₄₂).

The spelling of 1043521 in words is "one million, forty-three thousand, five hundred twenty-one".