2137406 has 4 divisors (see below), whose sum is σ = 3206112. Its totient is φ = 1068702.

The previous prime is 2137397. The next prime is 2137409. The reversal of 2137406 is 6047312.

2137406 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 a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2137409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 534350 + ... + 534353.

It is an arithmetic number, because the mean of its divisors is an integer number (801528).

2^2137406 is an apocalyptic number.

2137406 is a deficient number, since it is larger than the sum of its proper divisors (1068706).

2137406 is a wasteful number, since it uses less digits than its factorization.

2137406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068705.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 2137406 is about 1461.9870040462. The cubic root of 2137406 is about 128.8137849654.

The spelling of 2137406 in words is "two million, one hundred thirty-seven thousand, four hundred six".