3287521 has 2 divisors, whose sum is σ = 3287522. Its totient is φ = 3287520.

The previous prime is 3287507. The next prime is 3287533. The reversal of 3287521 is 1257823.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2927521 + 360000 = 1711^2 + 600^2 .

It is a cyclic number.

It is not a de Polignac number, because 3287521 - 2¹³ = 3279329 is a prime.

It is a Chen prime.

3287521 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 3287521.

It is not a weakly prime, because it can be changed into another prime (3287821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1643760 + 1643761.

It is an arithmetic number, because the mean of its divisors is an integer number (1643761).

Almost surely, 2^3287521 is an apocalyptic number.

It is an amenable number.

3287521 is a deficient number, since it is larger than the sum of its proper divisors (1).

3287521 is an equidigital number, since it uses as much as digits as its factorization.

3287521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3360, while the sum is 28.

The square root of 3287521 is about 1813.1522274757. The cubic root of 3287521 is about 148.6926535530.

It can be divided in two parts, 32875 and 21, that added together give a triangular number (32896 = T₂₅₆).

The spelling of 3287521 in words is "three million, two hundred eighty-seven thousand, five hundred twenty-one".