405021113 has 6 divisors (see below), whose sum is σ = 471147066. Its totient is φ = 347160912.

The previous prime is 405021013. The next prime is 405021121. The reversal of 405021113 is 311120504.

It can be written as a sum of positive squares in only one way, i.e., 281299984 + 123721129 = 16772^2 + 11123^2 .

It is not a de Polignac number, because 405021113 - 2¹⁴ = 405004729 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 405021091 and 405021100.

It is not an unprimeable number, because it can be changed into a prime (405021143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4132820 + ... + 4132917.

It is an arithmetic number, because the mean of its divisors is an integer number (78524511).

Almost surely, 2^405021113 is an apocalyptic number.

It is an amenable number.

405021113 is a deficient number, since it is larger than the sum of its proper divisors (66125953).

405021113 is an equidigital number, since it uses as much as digits as its factorization.

405021113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8265751 (or 8265744 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 405021113 is about 20125.1363473642. The cubic root of 405021113 is about 739.8764786524.

Adding to 405021113 its reverse (311120504), we get a palindrome (716141617).

The spelling of 405021113 in words is "four hundred five million, twenty-one thousand, one hundred thirteen".