637842 has 8 divisors (see below), whose sum is σ = 1275696. Its totient is φ = 212612.

The previous prime is 637841. The next prime is 637873. The reversal of 637842 is 248736.

It is a sphenic number, since it is the product of 3 distinct primes.

637842 is an admirable number.

It is a d-powerful number, because it can be written as 6⁶ + 3¹² + 8⁵ + 7⁴ + 4⁷ + 2¹³ .

It is not an unprimeable number, because it can be changed into a prime (637841) 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, 53148 + ... + 53159.

It is an arithmetic number, because the mean of its divisors is an integer number (159462).

2⁶³⁷⁸⁴² is an apocalyptic number.

637842 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

637842 is a wasteful number, since it uses less digits than its factorization.

637842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106312.

The product of its digits is 8064, while the sum is 30.

The square root of 637842 is about 798.6501111250. The cubic root of 637842 is about 86.0804187376.

The spelling of 637842 in words is "six hundred thirty-seven thousand, eight hundred forty-two".