2151206 has 8 divisors (see below), whose sum is σ = 3238704. Its totient is φ = 1071640.

The previous prime is 2151203. The next prime is 2151211. The reversal of 2151206 is 6021512.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1250 + ... + 2421.

It is an arithmetic number, because the mean of its divisors is an integer number (404838).

2^2151206 is an apocalyptic number.

2151206 is a deficient number, since it is larger than the sum of its proper divisors (1087498).

2151206 is a wasteful number, since it uses less digits than its factorization.

2151206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3966.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 2151206 is about 1466.6990147948. The cubic root of 2151206 is about 129.0904159509.

Adding to 2151206 its reverse (6021512), we get a palindrome (8172718).

The spelling of 2151206 in words is "two million, one hundred fifty-one thousand, two hundred six".