7043906 has 4 divisors (see below), whose sum is σ = 10565862. Its totient is φ = 3521952.

The previous prime is 7043887. The next prime is 7043909. The reversal of 7043906 is 6093407.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6093407 = 197 ⋅30931.

It can be written as a sum of positive squares in only one way, i.e., 6713281 + 330625 = 2591^2 + 575^2 .

It is a super-2 number, since 2×7043906² = 99233223473672, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7043909) by changing a digit.

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, 1760975 + ... + 1760978.

Almost surely, 2^7043906 is an apocalyptic number.

7043906 is a deficient number, since it is larger than the sum of its proper divisors (3521956).

7043906 is a wasteful number, since it uses less digits than its factorization.

7043906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3521955.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 7043906 is about 2654.0357947850. The cubic root of 7043906 is about 191.6922333465.

The spelling of 7043906 in words is "seven million, forty-three thousand, nine hundred six".