6427381 has 4 divisors (see below), whose sum is σ = 6601132. Its totient is φ = 6253632.

The previous prime is 6427367. The next prime is 6427433. The reversal of 6427381 is 1837246.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5803281 + 624100 = 2409^2 + 790^2 .

It is a cyclic number.

It is not a de Polignac number, because 6427381 - 2⁵ = 6427349 is a prime.

It is a super-2 number, since 2×6427381² = 82622453038322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6427331) 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, 86820 + ... + 86893.

It is an arithmetic number, because the mean of its divisors is an integer number (1650283).

Almost surely, 2^6427381 is an apocalyptic number.

It is an amenable number.

6427381 is a deficient number, since it is larger than the sum of its proper divisors (173751).

6427381 is a wasteful number, since it uses less digits than its factorization.

6427381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173750.

The product of its digits is 8064, while the sum is 31.

The square root of 6427381 is about 2535.2279976365. The cubic root of 6427381 is about 185.9279502804.

The spelling of 6427381 in words is "six million, four hundred twenty-seven thousand, three hundred eighty-one".