6381375 has 128 divisors (see below), whose sum is σ = 15095808. Its totient is φ = 2304000.

The previous prime is 6381371. The next prime is 6381379. The reversal of 6381375 is 5731836.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6381371) and next prime (6381379).

It is not a de Polignac number, because 6381375 - 2² = 6381371 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

Its product of digits (15120) is a multiple of the sum of its prime divisors (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6381371) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 375367 + ... + 375383.

It is an arithmetic number, because the mean of its divisors is an integer number (117936).

Almost surely, 2^6381375 is an apocalyptic number.

6381375 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

6381375 is an abundant number, since it is smaller than the sum of its proper divisors (8714433).

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

6381375 is a wasteful number, since it uses less digits than its factorization.

6381375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66 (or 56 counting only the distinct ones).

The product of its digits is 15120, while the sum is 33.

The square root of 6381375 is about 2526.1383572560. The cubic root of 6381375 is about 185.4832750352.

The spelling of 6381375 in words is "six million, three hundred eighty-one thousand, three hundred seventy-five".