2684945 has 4 divisors (see below), whose sum is σ = 3221940. Its totient is φ = 2147952.

The previous prime is 2684939. The next prime is 2684953. The reversal of 2684945 is 5494862.

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

It can be written as a sum of positive squares in 2 ways, for example, as 410881 + 2274064 = 641^2 + 1508^2 .

It is a cyclic number.

It is not a de Polignac number, because 2684945 - 2⁶ = 2684881 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2684899 and 2684908.

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, 268490 + ... + 268499.

It is an arithmetic number, because the mean of its divisors is an integer number (805485).

2^2684945 is an apocalyptic number.

It is an amenable number.

2684945 is a deficient number, since it is larger than the sum of its proper divisors (536995).

2684945 is an equidigital number, since it uses as much as digits as its factorization.

2684945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536994.

The product of its digits is 69120, while the sum is 38.

The square root of 2684945 is about 1638.5801780810. The cubic root of 2684945 is about 138.9883709195.

The spelling of 2684945 in words is "two million, six hundred eighty-four thousand, nine hundred forty-five".