2166427 has 2 divisors, whose sum is σ = 2166428. Its totient is φ = 2166426.

The previous prime is 2166419. The next prime is 2166431. The reversal of 2166427 is 7246612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2166427 - 2³ = 2166419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2166395 and 2166404.

It is not a weakly prime, because it can be changed into another prime (2166407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1083213 + 1083214.

It is an arithmetic number, because the mean of its divisors is an integer number (1083214).

2^2166427 is an apocalyptic number.

2166427 is a deficient number, since it is larger than the sum of its proper divisors (1).

2166427 is an equidigital number, since it uses as much as digits as its factorization.

2166427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 28.

The square root of 2166427 is about 1471.8787314178. The cubic root of 2166427 is about 129.3941632640.

The spelling of 2166427 in words is "two million, one hundred sixty-six thousand, four hundred twenty-seven".