16406042 has 4 divisors (see below), whose sum is σ = 24609066. Its totient is φ = 8203020.

The previous prime is 16406023. The next prime is 16406051. The reversal of 16406042 is 24060461.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 13169641 + 3236401 = 3629^2 + 1799^2 .

It is a junction number, because it is equal to n+sod(n) for n = 16405999 and 16406017.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4101509 + ... + 4101512.

Almost surely, 2^16406042 is an apocalyptic number.

16406042 is a deficient number, since it is larger than the sum of its proper divisors (8203024).

16406042 is an equidigital number, since it uses as much as digits as its factorization.

16406042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8203023.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 16406042 is about 4050.4372603461. The cubic root of 16406042 is about 254.0980153684.

The spelling of 16406042 in words is "sixteen million, four hundred six thousand, forty-two".