2681409 has 8 divisors (see below), whose sum is σ = 3730752. Its totient is φ = 1709840.

The previous prime is 2681389. The next prime is 2681417. The reversal of 2681409 is 9041862.

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 2681409 - 2⁹ = 2680897 is a prime.

2681409 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2681009) 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, 19362 + ... + 19499.

It is an arithmetic number, because the mean of its divisors is an integer number (466344).

2^2681409 is an apocalyptic number.

It is an amenable number.

2681409 is a deficient number, since it is larger than the sum of its proper divisors (1049343).

2681409 is a wasteful number, since it uses less digits than its factorization.

2681409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38887.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 2681409 is about 1637.5008396944. The cubic root of 2681409 is about 138.9273294723.

The spelling of 2681409 in words is "two million, six hundred eighty-one thousand, four hundred nine".