405366421 has 8 divisors (see below), whose sum is σ = 423213120. Its totient is φ = 387538272.

The previous prime is 405366361. The next prime is 405366427. The reversal of 405366421 is 124663504.

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 405366421 - 2¹³ = 405358229 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 (405366427) 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, 58425 + ... + 64993.

It is an arithmetic number, because the mean of its divisors is an integer number (52901640).

Almost surely, 2^405366421 is an apocalyptic number.

It is an amenable number.

405366421 is a deficient number, since it is larger than the sum of its proper divisors (17846699).

405366421 is a wasteful number, since it uses less digits than its factorization.

405366421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9275.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 405366421 is about 20133.7135422157. The cubic root of 405366421 is about 740.0866839043.

The spelling of 405366421 in words is "four hundred five million, three hundred sixty-six thousand, four hundred twenty-one".