401543 has 4 divisors (see below), whose sum is σ = 414528. Its totient is φ = 388560.

The previous prime is 401539. The next prime is 401551. The reversal of 401543 is 345104.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 401543 - 2² = 401539 is a prime.

It is a super-2 number, since 2×401543² = 322473561698, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6446 + ... + 6507.

It is an arithmetic number, because the mean of its divisors is an integer number (103632).

2⁴⁰¹⁵⁴³ is an apocalyptic number.

401543 is a deficient number, since it is larger than the sum of its proper divisors (12985).

401543 is a wasteful number, since it uses less digits than its factorization.

401543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12984.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 401543 is about 633.6742065131. The cubic root of 401543 is about 73.7752494221.

Adding to 401543 its reverse (345104), we get a palindrome (746647).

The spelling of 401543 in words is "four hundred one thousand, five hundred forty-three".