405501 has 8 divisors (see below), whose sum is σ = 572544. Its totient is φ = 254400.

The previous prime is 405499. The next prime is 405521. The reversal of 405501 is 105504.

405501 is nontrivially palindromic in base 5.

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

It is not a de Polignac number, because 405501 - 2¹ = 405499 is a prime.

It is a super-2 number, since 2×405501² = 328862122002, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405521) 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, 3925 + ... + 4026.

It is an arithmetic number, because the mean of its divisors is an integer number (71568).

2⁴⁰⁵⁵⁰¹ is an apocalyptic number.

It is an amenable number.

405501 is a deficient number, since it is larger than the sum of its proper divisors (167043).

405501 is a wasteful number, since it uses less digits than its factorization.

405501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7971.

The product of its (nonzero) digits is 100, while the sum is 15.

The square root of 405501 is about 636.7896041865. The cubic root of 405501 is about 74.0168576155.

The spelling of 405501 in words is "four hundred five thousand, five hundred one".