2415521 has 2 divisors, whose sum is σ = 2415522. Its totient is φ = 2415520.

The previous prime is 2415503. The next prime is 2415533. The reversal of 2415521 is 1255142.

2415521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

2415521 is an esthetic number in base 6, because in such base its adjacent digits differ by 1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1860496 + 555025 = 1364^2 + 745^2 .

It is a cyclic number.

It is not a de Polignac number, because 2415521 - 2¹⁸ = 2153377 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2415493 and 2415502.

It is not a weakly prime, because it can be changed into another prime (2415541) 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, 1207760 + 1207761.

It is an arithmetic number, because the mean of its divisors is an integer number (1207761).

2^2415521 is an apocalyptic number.

It is an amenable number.

2415521 is a deficient number, since it is larger than the sum of its proper divisors (1).

2415521 is an equidigital number, since it uses as much as digits as its factorization.

2415521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 400, while the sum is 20.

The square root of 2415521 is about 1554.1946467544. The cubic root of 2415521 is about 134.1745886470.

The spelling of 2415521 in words is "two million, four hundred fifteen thousand, five hundred twenty-one".