601531 has 4 divisors (see below), whose sum is σ = 687472. Its totient is φ = 515592.

The previous prime is 601507. The next prime is 601541. The reversal of 601531 is 135106.

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

It is not a de Polignac number, because 601531 - 2¹⁹ = 77243 is a prime.

It is a super-2 number, since 2×601531² = 723679087922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (601541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42960 + ... + 42973.

It is an arithmetic number, because the mean of its divisors is an integer number (171868).

2⁶⁰¹⁵³¹ is an apocalyptic number.

601531 is a deficient number, since it is larger than the sum of its proper divisors (85941).

601531 is an equidigital number, since it uses as much as digits as its factorization.

601531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85940.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 601531 is about 775.5842958699. The cubic root of 601531 is about 84.4149442328.

Adding to 601531 its reverse (135106), we get a palindrome (736637).

The spelling of 601531 in words is "six hundred one thousand, five hundred thirty-one".