612891 has 6 divisors (see below), whose sum is σ = 885300. Its totient is φ = 408588.

The previous prime is 612889. The next prime is 612923. The reversal of 612891 is 198216.

612891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 612891 - 2¹ = 612889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (612811) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34041 + ... + 34058.

It is an arithmetic number, because the mean of its divisors is an integer number (147550).

2⁶¹²⁸⁹¹ is an apocalyptic number.

612891 is a deficient number, since it is larger than the sum of its proper divisors (272409).

612891 is a wasteful number, since it uses less digits than its factorization.

612891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68105 (or 68102 counting only the distinct ones).

The product of its digits is 864, while the sum is 27.

The square root of 612891 is about 782.8735530084. The cubic root of 612891 is about 84.9430298758.

The spelling of 612891 in words is "six hundred twelve thousand, eight hundred ninety-one".