2151266 has 16 divisors (see below), whose sum is σ = 3515064. Its totient is φ = 981504.

The previous prime is 2151263. The next prime is 2151269. The reversal of 2151266 is 6621512.

It is an interprime number because it is at equal distance from previous prime (2151263) and next prime (2151269).

It can be written as a sum of positive squares in 4 ways, for example, as 863041 + 1288225 = 929^2 + 1135^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2151263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2096 + ... + 2948.

2^2151266 is an apocalyptic number.

2151266 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2151266 is a deficient number, since it is larger than the sum of its proper divisors (1363798).

2151266 is a wasteful number, since it uses less digits than its factorization.

2151266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 965.

The product of its digits is 720, while the sum is 23.

The square root of 2151266 is about 1466.7194687465. The cubic root of 2151266 is about 129.0916161076.

Adding to 2151266 its reverse (6621512), we get a palindrome (8772778).

The spelling of 2151266 in words is "two million, one hundred fifty-one thousand, two hundred sixty-six".