3213706 has 4 divisors (see below), whose sum is σ = 4820562. Its totient is φ = 1606852.

The previous prime is 3213689. The next prime is 3213737. The reversal of 3213706 is 6073123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6073123 = 7 ⋅867589.

It can be written as a sum of positive squares in only one way, i.e., 2430481 + 783225 = 1559^2 + 885^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 803425 + ... + 803428.

Almost surely, 2^3213706 is an apocalyptic number.

3213706 is a deficient number, since it is larger than the sum of its proper divisors (1606856).

3213706 is a wasteful number, since it uses less digits than its factorization.

3213706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1606855.

The product of its (nonzero) digits is 756, while the sum is 22.

The square root of 3213706 is about 1792.6812321213. The cubic root of 3213706 is about 147.5713491832.

Adding to 3213706 its reverse (6073123), we get a palindrome (9286829).

The spelling of 3213706 in words is "three million, two hundred thirteen thousand, seven hundred six".