2605019 has 2 divisors, whose sum is σ = 2605020. Its totient is φ = 2605018.

The previous prime is 2605013. The next prime is 2605021. The reversal of 2605019 is 9105062.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2605019 is a prime.

It is a super-2 number, since 2×2605019² = 13572247980722, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 2605021, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 2604985 and 2605003.

It is not a weakly prime, because it can be changed into another prime (2605013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1302509 + 1302510.

It is an arithmetic number, because the mean of its divisors is an integer number (1302510).

2^2605019 is an apocalyptic number.

2605019 is a deficient number, since it is larger than the sum of its proper divisors (1).

2605019 is an equidigital number, since it uses as much as digits as its factorization.

2605019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 2605019 is about 1614.0071251392. The cubic root of 2605019 is about 137.5953102275.

Subtracting from 2605019 its sum of digits (23), we obtain a square (2604996 = 1614²).

The spelling of 2605019 in words is "two million, six hundred five thousand, nineteen".