6406042 has 32 divisors (see below), whose sum is σ = 10789200. Its totient is φ = 2838528.

The previous prime is 6405989. The next prime is 6406051. The reversal of 6406042 is 2406046.

It can be written as a sum of positive squares in 8 ways, for example, as 3381921 + 3024121 = 1839^2 + 1739^2 .

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71934 + ... + 72022.

Almost surely, 2^6406042 is an apocalyptic number.

6406042 is a deficient number, since it is larger than the sum of its proper divisors (4383158).

6406042 is a wasteful number, since it uses less digits than its factorization.

6406042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 6406042 is about 2531.0160015298. The cubic root of 6406042 is about 185.7219609677.

The spelling of 6406042 in words is "six million, four hundred six thousand, forty-two".