405176641 has 3 divisors (see below), whose sum is σ = 405196771. Its totient is φ = 405156512.

The previous prime is 405176621. The next prime is 405176669. The reversal of 405176641 is 146671504.

The square root of 405176641 is 20129.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 363703041 + 41473600 = 19071^2 + 6440^2 .

It is not a de Polignac number, because 405176641 - 2²⁷ = 270958913 is a prime.

It is a super-2 number, since 2×405176641² = 328336220824085762, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 405176597 and 405176606.

It is not an unprimeable number, because it can be changed into a prime (405176621) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 10065 + ... + 30193.

Almost surely, 2^405176641 is an apocalyptic number.

405176641 is the 20129-th square number.

405176641 is the 10065-th centered octagonal number.

It is an amenable number.

405176641 is a deficient number, since it is larger than the sum of its proper divisors (20130).

405176641 is an frugal number, since it uses more digits than its factorization.

405176641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40258 (or 20129 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The cubic root of 405176641 is about 739.9711706568.

The spelling of 405176641 in words is "four hundred five million, one hundred seventy-six thousand, six hundred forty-one".