2131706 has 16 divisors (see below), whose sum is σ = 3301128. Its totient is φ = 1032000.

The previous prime is 2131699. The next prime is 2131721. The reversal of 2131706 is 6071312.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2076481 + 55225 = 1441^2 + 235^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12236 + ... + 12408.

2^2131706 is an apocalyptic number.

2131706 is a deficient number, since it is larger than the sum of its proper divisors (1169422).

2131706 is a wasteful number, since it uses less digits than its factorization.

2131706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 2131706 is about 1460.0363009186. The cubic root of 2131706 is about 128.6991768488.

It can be divided in two parts, 213 and 1706, that multiplied together give a triangular number (363378 = T₈₅₂).

The spelling of 2131706 in words is "two million, one hundred thirty-one thousand, seven hundred six".