401558 has 4 divisors (see below), whose sum is σ = 602340. Its totient is φ = 200778.

The previous prime is 401551. The next prime is 401567. The reversal of 401558 is 855104.

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

It is a super-2 number, since 2×401558² = 322497654728, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401551) 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 as a sum of consecutive naturals, namely, 100388 + ... + 100391.

It is an arithmetic number, because the mean of its divisors is an integer number (150585).

2⁴⁰¹⁵⁵⁸ is an apocalyptic number.

401558 is a deficient number, since it is larger than the sum of its proper divisors (200782).

401558 is a wasteful number, since it uses less digits than its factorization.

401558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200781.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 401558 is about 633.6860421376. The cubic root of 401558 is about 73.7761680576.

It can be divided in two parts, 401 and 558, that added together give a palindrome (959).

The spelling of 401558 in words is "four hundred one thousand, five hundred fifty-eight".