1003401 has 16 divisors (see below), whose sum is σ = 1699200. Its totient is φ = 573264.

The previous prime is 1003397. The next prime is 1003411. The reversal of 1003401 is 1043001.

1003401 = T₂₀ + T₂₁ + ... + T₁₈₁.

It is not a de Polignac number, because 1003401 - 2² = 1003397 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (1003411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2466 + ... + 2843.

It is an arithmetic number, because the mean of its divisors is an integer number (106200).

2^1003401 is an apocalyptic number.

It is an amenable number.

1003401 is a deficient number, since it is larger than the sum of its proper divisors (695799).

1003401 is an equidigital number, since it uses as much as digits as its factorization.

1003401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5325 (or 5319 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 1003401 is about 1001.6990566033. The cubic root of 1003401 is about 100.1132383889.

Adding to 1003401 its reverse (1043001), we get a palindrome (2046402).

The spelling of 1003401 in words is "one million, three thousand, four hundred one".