405503161 has 8 divisors (see below), whose sum is σ = 474735744. Its totient is φ = 339096480.

The previous prime is 405503141. The next prime is 405503191. The reversal of 405503161 is 161305504.

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 405503161 - 2²¹ = 403406009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (405503141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 706165 + ... + 706738.

It is an arithmetic number, because the mean of its divisors is an integer number (59341968).

Almost surely, 2^405503161 is an apocalyptic number.

405503161 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

405503161 is a deficient number, since it is larger than the sum of its proper divisors (69232583).

405503161 is a wasteful number, since it uses less digits than its factorization.

405503161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1412951.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 405503161 is about 20137.1090526917. The cubic root of 405503161 is about 740.1698909906.

Adding to 405503161 its reverse (161305504), we get a palindrome (566808665).

The spelling of 405503161 in words is "four hundred five million, five hundred three thousand, one hundred sixty-one".