2618521 has 2 divisors, whose sum is σ = 2618522. Its totient is φ = 2618520.

The previous prime is 2618501. The next prime is 2618531. The reversal of 2618521 is 1258162.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2368521 + 250000 = 1539^2 + 500^2 .

It is a cyclic number.

It is not a de Polignac number, because 2618521 - 2¹⁹ = 2094233 is a prime.

It is not a weakly prime, because it can be changed into another prime (2618501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1309260 + 1309261.

It is an arithmetic number, because the mean of its divisors is an integer number (1309261).

2^2618521 is an apocalyptic number.

It is an amenable number.

2618521 is a deficient number, since it is larger than the sum of its proper divisors (1).

2618521 is an equidigital number, since it uses as much as digits as its factorization.

2618521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 960, while the sum is 25.

The square root of 2618521 is about 1618.1844765045. The cubic root of 2618521 is about 137.8326228108.

The spelling of 2618521 in words is "two million, six hundred eighteen thousand, five hundred twenty-one".