2645945 has 8 divisors (see below), whose sum is σ = 3183936. Its totient is φ = 2110896.

The previous prime is 2645941. The next prime is 2645971. The reversal of 2645945 is 5495462.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2645945 - 2² = 2645941 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2645941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2804 + ... + 3626.

It is an arithmetic number, because the mean of its divisors is an integer number (397992).

2^2645945 is an apocalyptic number.

It is an amenable number.

2645945 is a deficient number, since it is larger than the sum of its proper divisors (537991).

2645945 is an equidigital number, since it uses as much as digits as its factorization.

2645945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1471.

The product of its digits is 43200, while the sum is 35.

The square root of 2645945 is about 1626.6360994396. The cubic root of 2645945 is about 138.3121304256.

The spelling of 2645945 in words is "two million, six hundred forty-five thousand, nine hundred forty-five".