6401003 has 4 divisors (see below), whose sum is σ = 7315440. Its totient is φ = 5486568.

The previous prime is 6400987. The next prime is 6401011. The reversal of 6401003 is 3001046.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3001046 = 2 ⋅1500523.

It is a cyclic number.

It is not a de Polignac number, because 6401003 - 2⁴ = 6400987 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6401033) 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, 457208 + ... + 457221.

It is an arithmetic number, because the mean of its divisors is an integer number (1828860).

Almost surely, 2^6401003 is an apocalyptic number.

6401003 is a deficient number, since it is larger than the sum of its proper divisors (914437).

6401003 is an equidigital number, since it uses as much as digits as its factorization.

6401003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 914436.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 6401003 is about 2530.0203556493. The cubic root of 6401003 is about 185.6732518246.

Adding to 6401003 its reverse (3001046), we get a palindrome (9402049).

The spelling of 6401003 in words is "six million, four hundred one thousand, three".