2646505 has 4 divisors (see below), whose sum is σ = 3175812. Its totient is φ = 2117200.

The previous prime is 2646493. The next prime is 2646517. The reversal of 2646505 is 5056462.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5056462 = 2 ⋅2528231.

It is an interprime number because it is at equal distance from previous prime (2646493) and next prime (2646517).

It can be written as a sum of positive squares in 2 ways, for example, as 627264 + 2019241 = 792^2 + 1421^2 .

It is not a de Polignac number, because 2646505 - 2⁵ = 2646473 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

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, 264646 + ... + 264655.

It is an arithmetic number, because the mean of its divisors is an integer number (793953).

2^2646505 is an apocalyptic number.

It is an amenable number.

2646505 is a deficient number, since it is larger than the sum of its proper divisors (529307).

2646505 is an equidigital number, since it uses as much as digits as its factorization.

2646505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529306.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 2646505 is about 1626.8082247149. The cubic root of 2646505 is about 138.3218874096.

The spelling of 2646505 in words is "two million, six hundred forty-six thousand, five hundred five".