11281906 has 4 divisors (see below), whose sum is σ = 16922862. Its totient is φ = 5640952.

The previous prime is 11281903. The next prime is 11281909. The reversal of 11281906 is 60918211.

It is a happy number.

11281906 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an interprime number because it is at equal distance from previous prime (11281903) and next prime (11281909).

It can be written as a sum of positive squares in only one way, i.e., 10989225 + 292681 = 3315^2 + 541^2 .

It is not an unprimeable number, because it can be changed into a prime (11281901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2820475 + ... + 2820478.

Almost surely, 2^11281906 is an apocalyptic number.

11281906 is a deficient number, since it is larger than the sum of its proper divisors (5640956).

11281906 is an equidigital number, since it uses as much as digits as its factorization.

11281906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5640955.

The product of its (nonzero) digits is 864, while the sum is 28.

The square root of 11281906 is about 3358.8548643846. The cubic root of 11281906 is about 224.2818650922.

The spelling of 11281906 in words is "eleven million, two hundred eighty-one thousand, nine hundred six".