2154791 has 2 divisors, whose sum is σ = 2154792. Its totient is φ = 2154790.

The previous prime is 2154749. The next prime is 2154793. The reversal of 2154791 is 1974512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2154791 - 2⁶ = 2154727 is a prime.

It is a Sophie Germain prime.

Together with 2154793, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2154793) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077395 + 1077396.

It is an arithmetic number, because the mean of its divisors is an integer number (1077396).

2^2154791 is an apocalyptic number.

2154791 is a deficient number, since it is larger than the sum of its proper divisors (1).

2154791 is an equidigital number, since it uses as much as digits as its factorization.

2154791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2520, while the sum is 29.

The square root of 2154791 is about 1467.9206381818. The cubic root of 2154791 is about 129.1620861828.

The spelling of 2154791 in words is "two million, one hundred fifty-four thousand, seven hundred ninety-one".