1001438 has 4 divisors (see below), whose sum is σ = 1502160. Its totient is φ = 500718.

The previous prime is 1001431. The next prime is 1001447. The reversal of 1001438 is 8341001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250358 + ... + 250361.

It is an arithmetic number, because the mean of its divisors is an integer number (375540).

2^1001438 is an apocalyptic number.

1001438 is a deficient number, since it is larger than the sum of its proper divisors (500722).

1001438 is an equidigital number, since it uses as much as digits as its factorization.

1001438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500721.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1001438 is about 1000.7187417052. The cubic root of 1001438 is about 100.0479103756.

Adding to 1001438 its reverse (8341001), we get a palindrome (9342439).

The spelling of 1001438 in words is "one million, one thousand, four hundred thirty-eight".