1004387 has 4 divisors (see below), whose sum is σ = 1048080. Its totient is φ = 960696.

The previous prime is 1004371. The next prime is 1004401. The reversal of 1004387 is 7834001.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1004387 - 2⁴ = 1004371 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 43669 = 1004387 / (1 + 0 + 0 + 4 + 3 + 8 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1004317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21812 + ... + 21857.

It is an arithmetic number, because the mean of its divisors is an integer number (262020).

2^1004387 is an apocalyptic number.

1004387 is a deficient number, since it is larger than the sum of its proper divisors (43693).

1004387 is an equidigital number, since it uses as much as digits as its factorization.

1004387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43692.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 1004387 is about 1002.1910995414. The cubic root of 1004387 is about 100.1460200111.

Adding to 1004387 its reverse (7834001), we get a palindrome (8838388).

The spelling of 1004387 in words is "one million, four thousand, three hundred eighty-seven".