610851 has 4 divisors (see below), whose sum is σ = 814472. Its totient is φ = 407232.

The previous prime is 610849. The next prime is 610867. The reversal of 610851 is 158016.

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

It is not a de Polignac number, because 610851 - 2¹ = 610849 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (610801) 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, 101806 + ... + 101811.

It is an arithmetic number, because the mean of its divisors is an integer number (203618).

2⁶¹⁰⁸⁵¹ is an apocalyptic number.

610851 is a deficient number, since it is larger than the sum of its proper divisors (203621).

610851 is a wasteful number, since it uses less digits than its factorization.

610851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203620.

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

The square root of 610851 is about 781.5695746381. The cubic root of 610851 is about 84.8486811825.

Adding to 610851 its reverse (158016), we get a palindrome (768867).

The spelling of 610851 in words is "six hundred ten thousand, eight hundred fifty-one".