4120906 has 4 divisors (see below), whose sum is σ = 6181362. Its totient is φ = 2060452.

The previous prime is 4120903. The next prime is 4120931. The reversal of 4120906 is 6090214.

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., 2692881 + 1428025 = 1641^2 + 1195^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (4120903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1030225 + ... + 1030228.

Almost surely, 2^4120906 is an apocalyptic number.

4120906 is a deficient number, since it is larger than the sum of its proper divisors (2060456).

4120906 is a wasteful number, since it uses less digits than its factorization.

4120906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2060455.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 4120906 is about 2030.0014778320. The cubic root of 4120906 is about 160.3236417836.

The spelling of 4120906 in words is "four million, one hundred twenty thousand, nine hundred six".