2146409 has 4 divisors (see below), whose sum is σ = 2215680. Its totient is φ = 2077140.

The previous prime is 2146393. The next prime is 2146423. The reversal of 2146409 is 9046412.

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 2146409 - 2⁴ = 2146393 is a prime.

It is a super-5 number, since 5×2146409⁵ (a number of 33 digits) contains 55555 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2146439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34589 + ... + 34650.

It is an arithmetic number, because the mean of its divisors is an integer number (553920).

2^2146409 is an apocalyptic number.

It is an amenable number.

2146409 is a deficient number, since it is larger than the sum of its proper divisors (69271).

2146409 is an equidigital number, since it uses as much as digits as its factorization.

2146409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69270.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 2146409 is about 1465.0627972889. The cubic root of 2146409 is about 128.9943911188.

The spelling of 2146409 in words is "two million, one hundred forty-six thousand, four hundred nine".