405134481 has 4 divisors (see below), whose sum is σ = 540179312. Its totient is φ = 270089652.

The previous prime is 405134479. The next prime is 405134557. The reversal of 405134481 is 184431504.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 405134481 - 2¹ = 405134479 is a prime.

It is a super-2 number, since 2×405134481² = 328267895390278722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405134441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67522411 + ... + 67522416.

It is an arithmetic number, because the mean of its divisors is an integer number (135044828).

Almost surely, 2^405134481 is an apocalyptic number.

It is an amenable number.

405134481 is a deficient number, since it is larger than the sum of its proper divisors (135044831).

405134481 is a wasteful number, since it uses less digits than its factorization.

405134481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135044830.

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 405134481 is about 20127.9527274882. The cubic root of 405134481 is about 739.9455042654.

Adding to 405134481 its reverse (184431504), we get a palindrome (589565985).

The spelling of 405134481 in words is "four hundred five million, one hundred thirty-four thousand, four hundred eighty-one".