605881 has 4 divisors (see below), whose sum is σ = 614992. Its totient is φ = 596772.

The previous prime is 605879. The next prime is 605887. The reversal of 605881 is 188506.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 188506 = 2 ⋅94253.

It is a cyclic number.

It is not a de Polignac number, because 605881 - 2¹ = 605879 is a prime.

It is a super-2 number, since 2×605881² = 734183572322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (605887) 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, 4455 + ... + 4588.

It is an arithmetic number, because the mean of its divisors is an integer number (153748).

2⁶⁰⁵⁸⁸¹ is an apocalyptic number.

It is an amenable number.

605881 is a deficient number, since it is larger than the sum of its proper divisors (9111).

605881 is an equidigital number, since it uses as much as digits as its factorization.

605881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9110.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 605881 is about 778.3835815329. The cubic root of 605881 is about 84.6179392532.

The spelling of 605881 in words is "six hundred five thousand, eight hundred eighty-one".