2137906 has 8 divisors (see below), whose sum is σ = 3216384. Its totient is φ = 1065780.

The previous prime is 2137879. The next prime is 2137907. The reversal of 2137906 is 6097312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2137907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 630 + ... + 2161.

It is an arithmetic number, because the mean of its divisors is an integer number (402048).

2^2137906 is an apocalyptic number.

2137906 is a deficient number, since it is larger than the sum of its proper divisors (1078478).

2137906 is a wasteful number, since it uses less digits than its factorization.

2137906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3176.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 2137906 is about 1462.1579941990. The cubic root of 2137906 is about 128.8238285839.

The spelling of 2137906 in words is "two million, one hundred thirty-seven thousand, nine hundred six".