601891 has 4 divisors (see below), whose sum is σ = 604384. Its totient is φ = 599400.

The previous prime is 601889. The next prime is 601897. The reversal of 601891 is 198106.

601891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 198106 = 2 ⋅99053.

It is a cyclic number.

It is not a de Polignac number, because 601891 - 2¹ = 601889 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (601897) 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, 840 + ... + 1381.

It is an arithmetic number, because the mean of its divisors is an integer number (151096).

2⁶⁰¹⁸⁹¹ is an apocalyptic number.

601891 is a deficient number, since it is larger than the sum of its proper divisors (2493).

601891 is a wasteful number, since it uses less digits than its factorization.

601891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2492.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 601891 is about 775.8163442465. The cubic root of 601891 is about 84.4317808932.

Adding to 601891 its reverse (198106), we get a palindrome (799997).

The spelling of 601891 in words is "six hundred one thousand, eight hundred ninety-one".