2149906 has 16 divisors (see below), whose sum is σ = 3565440. Its totient is φ = 964080.

The previous prime is 2149897. The next prime is 2149909. The reversal of 2149906 is 6099412.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2149909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1120 + ... + 2356.

It is an arithmetic number, because the mean of its divisors is an integer number (222840).

2^2149906 is an apocalyptic number.

2149906 is a deficient number, since it is larger than the sum of its proper divisors (1415534).

2149906 is a wasteful number, since it uses less digits than its factorization.

2149906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1329.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 2149906 is about 1466.2557757772. The cubic root of 2149906 is about 129.0644070739.

The spelling of 2149906 in words is "two million, one hundred forty-nine thousand, nine hundred six".