2609345 has 4 divisors (see below), whose sum is σ = 3131220. Its totient is φ = 2087472.

The previous prime is 2609339. The next prime is 2609353. The reversal of 2609345 is 5439062.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5439062 = 2 ⋅2719531.

It can be written as a sum of positive squares in 2 ways, for example, as 693889 + 1915456 = 833^2 + 1384^2 .

It is a cyclic number.

It is not a de Polignac number, because 2609345 - 2⁴ = 2609329 is a prime.

It is a Curzon 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, 260930 + ... + 260939.

It is an arithmetic number, because the mean of its divisors is an integer number (782805).

2^2609345 is an apocalyptic number.

It is an amenable number.

2609345 is a deficient number, since it is larger than the sum of its proper divisors (521875).

2609345 is an equidigital number, since it uses as much as digits as its factorization.

2609345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521874.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 2609345 is about 1615.3467120095. The cubic root of 2609345 is about 137.6714335525.

The spelling of 2609345 in words is "two million, six hundred nine thousand, three hundred forty-five".