2151286 has 4 divisors (see below), whose sum is σ = 3226932. Its totient is φ = 1075642.

The previous prime is 2151283. The next prime is 2151293. The reversal of 2151286 is 6821512.

2151286 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2151286.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 537820 + ... + 537823.

It is an arithmetic number, because the mean of its divisors is an integer number (806733).

2^2151286 is an apocalyptic number.

2151286 is a deficient number, since it is larger than the sum of its proper divisors (1075646).

2151286 is a wasteful number, since it uses less digits than its factorization.

2151286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1075645.

The product of its digits is 960, while the sum is 25.

The square root of 2151286 is about 1466.7262866670. The cubic root of 2151286 is about 129.0920161549.

Adding to 2151286 its reverse (6821512), we get a palindrome (8972798).

The spelling of 2151286 in words is "two million, one hundred fifty-one thousand, two hundred eighty-six".