1003994 has 4 divisors (see below), whose sum is σ = 1505994. Its totient is φ = 501996.

The previous prime is 1003963. The next prime is 1004027. The reversal of 1003994 is 4993001.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 877969 + 126025 = 937^2 + 355^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250997 + ... + 251000.

2^1003994 is an apocalyptic number.

1003994 is a deficient number, since it is larger than the sum of its proper divisors (502000).

1003994 is an equidigital number, since it uses as much as digits as its factorization.

1003994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501999.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 1003994 is about 1001.9950099676. The cubic root of 1003994 is about 100.1329564807.

Adding to 1003994 its reverse (4993001), we get a palindrome (5996995).

The spelling of 1003994 in words is "one million, three thousand, nine hundred ninety-four".