6405123003 has 24 divisors (see below), whose sum is σ = 9136885968. Its totient is φ = 3989875968.

The previous prime is 6405122989. The next prime is 6405123103. The reversal of 6405123003 is 3003215046.

It is a happy number.

It is not a de Polignac number, because 6405123003 - 2¹⁰ = 6405121979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6405123103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38551 + ... + 119567.

It is an arithmetic number, because the mean of its divisors is an integer number (380703582).

Almost surely, 2^6405123003 is an apocalyptic number.

6405123003 is a deficient number, since it is larger than the sum of its proper divisors (2731762965).

6405123003 is a wasteful number, since it uses less digits than its factorization.

6405123003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81131 (or 81112 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 6405123003 is about 80032.0123638035. The cubic root of 6405123003 is about 1857.1307945198.

Adding to 6405123003 its reverse (3003215046), we get a palindrome (9408338049).

The spelling of 6405123003 in words is "six billion, four hundred five million, one hundred twenty-three thousand, three".