2172427 has 2 divisors, whose sum is σ = 2172428. Its totient is φ = 2172426.

The previous prime is 2172397. The next prime is 2172433. The reversal of 2172427 is 7242712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2172427 - 2¹¹ = 2170379 is a prime.

It is not a weakly prime, because it can be changed into another prime (2172497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1086213 + 1086214.

It is an arithmetic number, because the mean of its divisors is an integer number (1086214).

2^2172427 is an apocalyptic number.

2172427 is a deficient number, since it is larger than the sum of its proper divisors (1).

2172427 is an equidigital number, since it uses as much as digits as its factorization.

2172427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1568, while the sum is 25.

The square root of 2172427 is about 1473.9155335364. The cubic root of 2172427 is about 129.5135071355.

The spelling of 2172427 in words is "two million, one hundred seventy-two thousand, four hundred twenty-seven".