1042638 has 8 divisors (see below), whose sum is σ = 2085288. Its totient is φ = 347544.

The previous prime is 1042633. The next prime is 1042681. The reversal of 1042638 is 8362401.

It is a happy number.

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

1042638 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1042631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86881 + ... + 86892.

It is an arithmetic number, because the mean of its divisors is an integer number (260661).

2^1042638 is an apocalyptic number.

1042638 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.

1042638 is a wasteful number, since it uses less digits than its factorization.

1042638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173778.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 1042638 is about 1021.0964694876. The cubic root of 1042638 is about 101.4015319805.

The spelling of 1042638 in words is "one million, forty-two thousand, six hundred thirty-eight".