2402409 has 8 divisors (see below), whose sum is σ = 3228192. Its totient is φ = 1589120.

The previous prime is 2402401. The next prime is 2402431. The reversal of 2402409 is 9042042.

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 2402409 - 2³ = 2402401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2402401) 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, 2664 + ... + 3449.

It is an arithmetic number, because the mean of its divisors is an integer number (403524).

2^2402409 is an apocalyptic number.

It is an amenable number.

2402409 is a deficient number, since it is larger than the sum of its proper divisors (825783).

2402409 is a wasteful number, since it uses less digits than its factorization.

2402409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6247.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 2402409 is about 1549.9706448833. The cubic root of 2402409 is about 133.9313712583.

It can be divided in two parts, 240240 and 9, that multiplied together give a triangular number (2162160 = T₂₀₇₉).

The spelling of 2402409 in words is "two million, four hundred two thousand, four hundred nine".