6401047 has 4 divisors (see below), whose sum is σ = 6441976. Its totient is φ = 6360120.

The previous prime is 6401033. The next prime is 6401069. The reversal of 6401047 is 7401046.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7401046 = 2 ⋅3700523.

It is a cyclic number.

It is not a de Polignac number, because 6401047 - 2¹¹ = 6398999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6408047) 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 3 ways as a sum of consecutive naturals, for example, 20229 + ... + 20542.

It is an arithmetic number, because the mean of its divisors is an integer number (1610494).

Almost surely, 2^6401047 is an apocalyptic number.

6401047 is a deficient number, since it is larger than the sum of its proper divisors (40929).

6401047 is a wasteful number, since it uses less digits than its factorization.

6401047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40928.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 6401047 is about 2530.0290512166. The cubic root of 6401047 is about 185.6736772581.

Subtracting 6401047 from its reverse (7401046), we obtain a palindrome (999999).

The spelling of 6401047 in words is "six million, four hundred one thousand, forty-seven".