406122271 has 4 divisors (see below), whose sum is σ = 406327032. Its totient is φ = 405917512.

The previous prime is 406122259. The next prime is 406122349. The reversal of 406122271 is 172221604.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 406122271 - 2⁵ = 406122239 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 (406122221) 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 3 ways as a sum of consecutive naturals, for example, 99376 + ... + 103381.

It is an arithmetic number, because the mean of its divisors is an integer number (101581758).

Almost surely, 2^406122271 is an apocalyptic number.

406122271 is a deficient number, since it is larger than the sum of its proper divisors (204761).

406122271 is a wasteful number, since it uses less digits than its factorization.

406122271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204760.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 406122271 is about 20152.4755551272. The cubic root of 406122271 is about 740.5463891379.

Adding to 406122271 its reverse (172221604), we get a palindrome (578343875).

The spelling of 406122271 in words is "four hundred six million, one hundred twenty-two thousand, two hundred seventy-one".