2705409 has 12 divisors (see below), whose sum is σ = 4466176. Its totient is φ = 1545912.

The previous prime is 2705383. The next prime is 2705413. The reversal of 2705409 is 9045072.

It is not a de Polignac number, because 2705409 - 2⁵ = 2705377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2705419) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21409 + ... + 21534.

It is a Proth number, since it is equal to 1321 ⋅ 2¹¹ + 1 and 1321 < 2¹¹.

2^2705409 is an apocalyptic number.

It is an amenable number.

2705409 is a deficient number, since it is larger than the sum of its proper divisors (1760767).

2705409 is a wasteful number, since it uses less digits than its factorization.

2705409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42956 (or 42953 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 2705409 is about 1644.8127553007. The cubic root of 2705409 is about 139.3405894794.

The spelling of 2705409 in words is "two million, seven hundred five thousand, four hundred nine".