2856506 has 4 divisors (see below), whose sum is σ = 4284762. Its totient is φ = 1428252.

The previous prime is 2856473. The next prime is 2856509. The reversal of 2856506 is 6056582.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2544025 + 312481 = 1595^2 + 559^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2856509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 714125 + ... + 714128.

2^2856506 is an apocalyptic number.

2856506 is a deficient number, since it is larger than the sum of its proper divisors (1428256).

2856506 is a wasteful number, since it uses less digits than its factorization.

2856506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1428255.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 2856506 is about 1690.1201140747. The cubic root of 2856506 is about 141.8877973668.

The spelling of 2856506 in words is "two million, eight hundred fifty-six thousand, five hundred six".