637642 has 8 divisors (see below), whose sum is σ = 961632. Its totient is φ = 317100.

The previous prime is 637627. The next prime is 637657. The reversal of 637642 is 246736.

It is an interprime number because it is at equal distance from previous prime (637627) and next prime (637657).

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

It is a d-powerful number, because it can be written as 6⁶ + 3⁹ + 6⁶ + 7³ + 4² + 2¹⁹ .

It is a self number, because there is not a number n which added to its sum of digits gives 637642.

It is an unprimeable number.

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, 334 + ... + 1177.

It is an arithmetic number, because the mean of its divisors is an integer number (120204).

2⁶³⁷⁶⁴² is an apocalyptic number.

637642 is a deficient number, since it is larger than the sum of its proper divisors (323990).

637642 is a wasteful number, since it uses less digits than its factorization.

637642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1724.

The product of its digits is 6048, while the sum is 28.

The square root of 637642 is about 798.5248900316. The cubic root of 637642 is about 86.0714207498.

The spelling of 637642 in words is "six hundred thirty-seven thousand, six hundred forty-two".