2616305 has 4 divisors (see below), whose sum is σ = 3139572. Its totient is φ = 2093040.

The previous prime is 2616287. The next prime is 2616331. The reversal of 2616305 is 5036162.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5036162 = 2 ⋅2518081.

It can be written as a sum of positive squares in 2 ways, for example, as 667489 + 1948816 = 817^2 + 1396^2 .

It is not a de Polignac number, because 2616305 - 2⁶ = 2616241 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 261626 + ... + 261635.

It is an arithmetic number, because the mean of its divisors is an integer number (784893).

2^2616305 is an apocalyptic number.

It is an amenable number.

2616305 is a deficient number, since it is larger than the sum of its proper divisors (523267).

2616305 is an equidigital number, since it uses as much as digits as its factorization.

2616305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523266.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 2616305 is about 1617.4996136012. The cubic root of 2616305 is about 137.7937302077.

Adding to 2616305 its sum of digits (23), we get a triangular number (2616328 = T₂₂₈₇).

The spelling of 2616305 in words is "two million, six hundred sixteen thousand, three hundred five".