2105451 has 6 divisors (see below), whose sum is σ = 3041220. Its totient is φ = 1403628.

The previous prime is 2105449. The next prime is 2105483. The reversal of 2105451 is 1545012.

2105451 is a `hidden beast` number, since 210 + 5 + 451 = 666.

It is not a de Polignac number, because 2105451 - 2¹ = 2105449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2105431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 116961 + ... + 116978.

It is an arithmetic number, because the mean of its divisors is an integer number (506870).

2^2105451 is an apocalyptic number.

2105451 is a deficient number, since it is larger than the sum of its proper divisors (935769).

2105451 is a wasteful number, since it uses less digits than its factorization.

2105451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233945 (or 233942 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 2105451 is about 1451.0172293946. The cubic root of 2105451 is about 128.1686213556.

It can be divided in two parts, 2105 and 451, that added together give a triangular number (2556 = T₇₁).

The spelling of 2105451 in words is "two million, one hundred five thousand, four hundred fifty-one".