2126551 has 6 divisors (see below), whose sum is σ = 2473800. Its totient is φ = 1822716.

The previous prime is 2126549. The next prime is 2126567. The reversal of 2126551 is 1556212.

2126551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2126551 - 2¹ = 2126549 is a prime.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2126351) 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 in 5 ways as a sum of consecutive naturals, for example, 21651 + ... + 21748.

It is an arithmetic number, because the mean of its divisors is an integer number (412300).

2^2126551 is an apocalyptic number.

2126551 is a deficient number, since it is larger than the sum of its proper divisors (347249).

2126551 is an equidigital number, since it uses as much as digits as its factorization.

2126551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43413 (or 43406 counting only the distinct ones).

The product of its digits is 600, while the sum is 22.

The square root of 2126551 is about 1458.2698652856. The cubic root of 2126551 is about 128.5953508103.

It can be divided in two parts, 21265 and 51, that added together give a square (21316 = 146²).

The spelling of 2126551 in words is "two million, one hundred twenty-six thousand, five hundred fifty-one".