2645515 has 4 divisors (see below), whose sum is σ = 3174624. Its totient is φ = 2116408.

The previous prime is 2645507. The next prime is 2645519. The reversal of 2645515 is 5155462.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2645515 - 2³ = 2645507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2645519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 264547 + ... + 264556.

It is an arithmetic number, because the mean of its divisors is an integer number (793656).

2^2645515 is an apocalyptic number.

2645515 is a deficient number, since it is larger than the sum of its proper divisors (529109).

2645515 is an equidigital number, since it uses as much as digits as its factorization.

2645515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529108.

The product of its digits is 6000, while the sum is 28.

The square root of 2645515 is about 1626.5039194542. The cubic root of 2645515 is about 138.3046375213.

It can be divided in two parts, 2645 and 515, that added together give a triangular number (3160 = T₇₉).

The spelling of 2645515 in words is "two million, six hundred forty-five thousand, five hundred fifteen".