401573 has 4 divisors (see below), whose sum is σ = 407148. Its totient is φ = 396000.

The previous prime is 401567. The next prime is 401587. The reversal of 401573 is 375104.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 332929 + 68644 = 577^2 + 262^2 .

It is a cyclic number.

It is not a de Polignac number, because 401573 - 2¹⁸ = 139429 is a prime.

It is a super-2 number, since 2×401573² = 322521748658, which contains 22 as substring.

It is a Duffinian number.

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, 2678 + ... + 2823.

It is an arithmetic number, because the mean of its divisors is an integer number (101787).

2⁴⁰¹⁵⁷³ is an apocalyptic number.

It is an amenable number.

401573 is a deficient number, since it is larger than the sum of its proper divisors (5575).

401573 is an equidigital number, since it uses as much as digits as its factorization.

401573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5574.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 401573 is about 633.6978775410. The cubic root of 401573 is about 73.7770866702. Note that the first 3 decimals are identical.

Adding to 401573 its reverse (375104), we get a palindrome (776677).

The spelling of 401573 in words is "four hundred one thousand, five hundred seventy-three".