16041521 has 2 divisors, whose sum is σ = 16041522. Its totient is φ = 16041520.

The previous prime is 16041469. The next prime is 16041533. The reversal of 16041521 is 12514061.

16041521 is digitally balanced in base 2, 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., 12567025 + 3474496 = 3545^2 + 1864^2 .

It is a cyclic number.

It is not a de Polignac number, because 16041521 - 2¹⁸ = 15779377 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 16041493 and 16041502.

It is not a weakly prime, because it can be changed into another prime (16041551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8020760 + 8020761.

It is an arithmetic number, because the mean of its divisors is an integer number (8020761).

Almost surely, 2^16041521 is an apocalyptic number.

It is an amenable number.

16041521 is a deficient number, since it is larger than the sum of its proper divisors (1).

16041521 is an equidigital number, since it uses as much as digits as its factorization.

16041521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 16041521 is about 4005.1867621873. The cubic root of 16041521 is about 252.2019932917.

Adding to 16041521 its reverse (12514061), we get a palindrome (28555582).

It can be divided in two parts, 1604 and 1521, that added together give a 5-th power (3125 = 5⁵).

The spelling of 16041521 in words is "sixteen million, forty-one thousand, five hundred twenty-one".