2851409 has 4 divisors (see below), whose sum is σ = 3110640. Its totient is φ = 2592180.

The previous prime is 2851403. The next prime is 2851421. The reversal of 2851409 is 9041582.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2851409 - 2⁸ = 2851153 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2851403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129599 + ... + 129620.

It is an arithmetic number, because the mean of its divisors is an integer number (777660).

2^2851409 is an apocalyptic number.

It is an amenable number.

2851409 is a deficient number, since it is larger than the sum of its proper divisors (259231).

2851409 is a wasteful number, since it uses less digits than its factorization.

2851409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259230.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 2851409 is about 1688.6115598325. The cubic root of 2851409 is about 141.8033547321.

The spelling of 2851409 in words is "two million, eight hundred fifty-one thousand, four hundred nine".