6409742 has 4 divisors (see below), whose sum is σ = 9614616. Its totient is φ = 3204870.

The previous prime is 6409721. The next prime is 6409747. The reversal of 6409742 is 2479046.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2479046 = 2 ⋅1239523.

It is a junction number, because it is equal to n+sod(n) for n = 6409699 and 6409708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6409747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1602434 + ... + 1602437.

It is an arithmetic number, because the mean of its divisors is an integer number (2403654).

Almost surely, 2^6409742 is an apocalyptic number.

6409742 is a deficient number, since it is larger than the sum of its proper divisors (3204874).

6409742 is a wasteful number, since it uses less digits than its factorization.

6409742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3204873.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 6409742 is about 2531.7468277851. The cubic root of 6409742 is about 185.7577104991.

The spelling of 6409742 in words is "six million, four hundred nine thousand, seven hundred forty-two".