6402123 has 24 divisors (see below), whose sum is σ = 11383008. Its totient is φ = 3376512.

The previous prime is 6402091. The next prime is 6402139. The reversal of 6402123 is 3212046.

It is a happy number.

6402123 is a `hidden beast` number, since 640 + 2 + 1 + 23 = 666.

It is not a de Polignac number, because 6402123 - 2⁵ = 6402091 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6402096 and 6402105.

It is not an unprimeable number, because it can be changed into a prime (6402163) 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, 3090 + ... + 4727.

It is an arithmetic number, because the mean of its divisors is an integer number (474292).

Almost surely, 2^6402123 is an apocalyptic number.

6402123 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

6402123 is a deficient number, since it is larger than the sum of its proper divisors (4980885).

6402123 is a wasteful number, since it uses less digits than its factorization.

6402123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7843 (or 7840 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 6402123 is about 2530.2416880606. The cubic root of 6402123 is about 185.6840804356.

Adding to 6402123 its reverse (3212046), we get a palindrome (9614169).

The spelling of 6402123 in words is "six million, four hundred two thousand, one hundred twenty-three".