406254191 has 16 divisors (see below), whose sum is σ = 479814144. Its totient is φ = 336693024.

The previous prime is 406254161. The next prime is 406254197. The reversal of 406254191 is 191452604.

It is a cyclic number.

It is not a de Polignac number, because 406254191 - 2¹⁰ = 406253167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406254197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37406 + ... + 47028.

It is an arithmetic number, because the mean of its divisors is an integer number (29988384).

Almost surely, 2^406254191 is an apocalyptic number.

406254191 is a deficient number, since it is larger than the sum of its proper divisors (73559953).

406254191 is a wasteful number, since it uses less digits than its factorization.

406254191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9830.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 406254191 is about 20155.7483363928. The cubic root of 406254191 is about 740.6265639282.

The spelling of 406254191 in words is "four hundred six million, two hundred fifty-four thousand, one hundred ninety-one".