2672645 has 4 divisors (see below), whose sum is σ = 3207180. Its totient is φ = 2138112.

The previous prime is 2672639. The next prime is 2672671. The reversal of 2672645 is 5462762.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5462762 = 2 ⋅2731381.

It can be written as a sum of positive squares in 2 ways, for example, as 1723969 + 948676 = 1313^2 + 974^2 .

It is a cyclic number.

It is not a de Polignac number, because 2672645 - 2⁴ = 2672629 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 267260 + ... + 267269.

It is an arithmetic number, because the mean of its divisors is an integer number (801795).

2^2672645 is an apocalyptic number.

It is an amenable number.

2672645 is a deficient number, since it is larger than the sum of its proper divisors (534535).

2672645 is an equidigital number, since it uses as much as digits as its factorization.

2672645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534534.

The product of its digits is 20160, while the sum is 32.

The square root of 2672645 is about 1634.8226203475. The cubic root of 2672645 is about 138.7758061461.

The spelling of 2672645 in words is "two million, six hundred seventy-two thousand, six hundred forty-five".