2106451 has 2 divisors, whose sum is σ = 2106452. Its totient is φ = 2106450.

The previous prime is 2106437. The next prime is 2106463. The reversal of 2106451 is 1546012.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2106451 is a prime.

It is not a weakly prime, because it can be changed into another prime (2106421) 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 as a sum of consecutive naturals, namely, 1053225 + 1053226.

It is an arithmetic number, because the mean of its divisors is an integer number (1053226).

2^2106451 is an apocalyptic number.

2106451 is a deficient number, since it is larger than the sum of its proper divisors (1).

2106451 is an equidigital number, since it uses as much as digits as its factorization.

2106451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 2106451 is about 1451.3617743347. The cubic root of 2106451 is about 128.1889096985.

It can be divided in two parts, 21064 and 51, that added together give a triangular number (21115 = T₂₀₅).

The spelling of 2106451 in words is "two million, one hundred six thousand, four hundred fifty-one".