6406427 has 2 divisors, whose sum is σ = 6406428. Its totient is φ = 6406426.

The previous prime is 6406381. The next prime is 6406447. The reversal of 6406427 is 7246046.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6406427 - 2¹⁶ = 6340891 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6406427.

It is not a weakly prime, because it can be changed into another prime (6406447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3203213 + 3203214.

It is an arithmetic number, because the mean of its divisors is an integer number (3203214).

Almost surely, 2^6406427 is an apocalyptic number.

6406427 is a deficient number, since it is larger than the sum of its proper divisors (1).

6406427 is an equidigital number, since it uses as much as digits as its factorization.

6406427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 6406427 is about 2531.0920568008. The cubic root of 6406427 is about 185.7256814929.

The spelling of 6406427 in words is "six million, four hundred six thousand, four hundred twenty-seven".