6404742 has 12 divisors (see below), whose sum is σ = 13876980. Its totient is φ = 2134908.

The previous prime is 6404719. The next prime is 6404743. The reversal of 6404742 is 2474046.

6404742 is nontrivially palindromic in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6404743) 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 in 5 ways as a sum of consecutive naturals, for example, 177892 + ... + 177927.

It is an arithmetic number, because the mean of its divisors is an integer number (1156415).

Almost surely, 2^6404742 is an apocalyptic number.

6404742 is an abundant number, since it is smaller than the sum of its proper divisors (7472238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6404742 is a wasteful number, since it uses less digits than its factorization.

6404742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355827 (or 355824 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 6404742 is about 2530.7591746352. The cubic root of 6404742 is about 185.7093970536.

Adding to 6404742 its reverse (2474046), we get a palindrome (8878788).

The spelling of 6404742 in words is "six million, four hundred four thousand, seven hundred forty-two".