6403442 has 8 divisors (see below), whose sum is σ = 9864876. Its totient is φ = 3115152.

The previous prime is 6403433. The next prime is 6403451. The reversal of 6403442 is 2443046.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6403433) and next prime (6403451).

It can be written as a sum of positive squares in 2 ways, for example, as 6345361 + 58081 = 2519^2 + 241^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43193 + ... + 43340.

Almost surely, 2^6403442 is an apocalyptic number.

6403442 is a deficient number, since it is larger than the sum of its proper divisors (3461434).

6403442 is a wasteful number, since it uses less digits than its factorization.

6403442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86572.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 6403442 is about 2530.5023216745. The cubic root of 6403442 is about 185.6968314394.

Adding to 6403442 its reverse (2443046), we get a palindrome (8846488).

The spelling of 6403442 in words is "six million, four hundred three thousand, four hundred forty-two".