2051409 has 8 divisors (see below), whose sum is σ = 2793600. Its totient is φ = 1338416.

The previous prime is 2051383. The next prime is 2051417. The reversal of 2051409 is 9041502.

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 2051409 - 2⁷ = 2051281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2051419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7134 + ... + 7415.

It is an arithmetic number, because the mean of its divisors is an integer number (349200).

2^2051409 is an apocalyptic number.

It is an amenable number.

2051409 is a deficient number, since it is larger than the sum of its proper divisors (742191).

2051409 is a wasteful number, since it uses less digits than its factorization.

2051409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14599.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 2051409 is about 1432.2740659525. The cubic root of 2051409 is about 127.0625066889.

The spelling of 2051409 in words is "two million, fifty-one thousand, four hundred nine".