601581 has 8 divisors (see below), whose sum is σ = 807040. Its totient is φ = 398592.

The previous prime is 601543. The next prime is 601589. The reversal of 601581 is 185106.

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

It is not a de Polignac number, because 601581 - 2¹⁰ = 600557 is a prime.

It is a super-2 number, since 2×601581² = 723799399122, 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 (601589) 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, 60 + ... + 1098.

It is an arithmetic number, because the mean of its divisors is an integer number (100880).

2⁶⁰¹⁵⁸¹ is an apocalyptic number.

It is an amenable number.

601581 is a deficient number, since it is larger than the sum of its proper divisors (205459).

601581 is a wasteful number, since it uses less digits than its factorization.

601581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1235.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 601581 is about 775.6165289626. The cubic root of 601581 is about 84.4172830594.

Adding to 601581 its reverse (185106), we get a palindrome (786687).

The spelling of 601581 in words is "six hundred one thousand, five hundred eighty-one".