405272111 has 4 divisors (see below), whose sum is σ = 409450272. Its totient is φ = 401093952.

The previous prime is 405272081. The next prime is 405272141. The reversal of 405272111 is 111272504.

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

It is an interprime number because it is at equal distance from previous prime (405272081) and next prime (405272141).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-405272111 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 (405272141) 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, 2088935 + ... + 2089128.

It is an arithmetic number, because the mean of its divisors is an integer number (102362568).

Almost surely, 2^405272111 is an apocalyptic number.

405272111 is a deficient number, since it is larger than the sum of its proper divisors (4178161).

405272111 is an equidigital number, since it uses as much as digits as its factorization.

405272111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4178160.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 405272111 is about 20131.3713144435. The cubic root of 405272111 is about 740.0292848162.

The spelling of 405272111 in words is "four hundred five million, two hundred seventy-two thousand, one hundred eleven".