405124321 has 8 divisors (see below), whose sum is σ = 474292224. Its totient is φ = 338779680.

The previous prime is 405124319. The next prime is 405124339. The reversal of 405124321 is 123421504.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 405124321 - 2¹ = 405124319 is a prime.

It is a super-2 number, since 2×405124321² = 328251430931422082, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 405124292 and 405124301.

It is not an unprimeable number, because it can be changed into a prime (405124301) 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 7 ways as a sum of consecutive naturals, for example, 705505 + ... + 706078.

It is an arithmetic number, because the mean of its divisors is an integer number (59286528).

Almost surely, 2^405124321 is an apocalyptic number.

405124321 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

405124321 is a deficient number, since it is larger than the sum of its proper divisors (69167903).

405124321 is a wasteful number, since it uses less digits than its factorization.

405124321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1411631.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 405124321 is about 20127.7003405754. The cubic root of 405124321 is about 739.9393187398.

Adding to 405124321 its reverse (123421504), we get a palindrome (528545825).

The spelling of 405124321 in words is "four hundred five million, one hundred twenty-four thousand, three hundred twenty-one".