2106506 has 8 divisors (see below), whose sum is σ = 3166020. Its totient is φ = 1051168.

The previous prime is 2106491. The next prime is 2106523. The reversal of 2106506 is 6056012.

It can be written as a sum of positive squares in 2 ways, for example, as 1452025 + 654481 = 1205^2 + 809^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1100 + ... + 2328.

2^2106506 is an apocalyptic number.

2106506 is a deficient number, since it is larger than the sum of its proper divisors (1059514).

2106506 is a wasteful number, since it uses less digits than its factorization.

2106506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2088.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 2106506 is about 1451.3807219334. The cubic root of 2106506 is about 128.1900253710.

The spelling of 2106506 in words is "two million, one hundred six thousand, five hundred six".