6437985 has 16 divisors (see below), whose sum is σ = 10907136. Its totient is φ = 3231488.

The previous prime is 6437983. The next prime is 6438007. The reversal of 6437985 is 5897346.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 6437985 - 2¹ = 6437983 is a prime.

6437985 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6437983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12369 + ... + 12878.

It is an arithmetic number, because the mean of its divisors is an integer number (681696).

Almost surely, 2^6437985 is an apocalyptic number.

It is an amenable number.

6437985 is a deficient number, since it is larger than the sum of its proper divisors (4469151).

6437985 is a wasteful number, since it uses less digits than its factorization.

6437985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25272.

The product of its digits is 181440, while the sum is 42.

The square root of 6437985 is about 2537.3184664129. The cubic root of 6437985 is about 186.0301431087.

The spelling of 6437985 in words is "six million, four hundred thirty-seven thousand, nine hundred eighty-five".