405545441 has 16 divisors (see below), whose sum is σ = 485004288. Its totient is φ = 331776000.

The previous prime is 405545411. The next prime is 405545447. The reversal of 405545441 is 144545504.

It is a cyclic number.

It is not a de Polignac number, because 405545441 - 2¹⁴ = 405529057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 405545398 and 405545407.

It is not an unprimeable number, because it can be changed into a prime (405545447) 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 15 ways as a sum of consecutive naturals, for example, 3041 + ... + 28641.

It is an arithmetic number, because the mean of its divisors is an integer number (30312768).

Almost surely, 2^405545441 is an apocalyptic number.

It is an amenable number.

405545441 is a deficient number, since it is larger than the sum of its proper divisors (79458847).

405545441 is a wasteful number, since it uses less digits than its factorization.

405545441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25712.

The product of its (nonzero) digits is 32000, while the sum is 32.

The square root of 405545441 is about 20138.1588284530. The cubic root of 405545441 is about 740.1956148307.

The spelling of 405545441 in words is "four hundred five million, five hundred forty-five thousand, four hundred forty-one".