618121 has 8 divisors (see below), whose sum is σ = 711360. Its totient is φ = 526128.

The previous prime is 618119. The next prime is 618131. The reversal of 618121 is 121816.

618121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 618121 - 2¹ = 618119 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (618131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1395 + ... + 1783.

It is an arithmetic number, because the mean of its divisors is an integer number (88920).

2⁶¹⁸¹²¹ is an apocalyptic number.

It is an amenable number.

618121 is a deficient number, since it is larger than the sum of its proper divisors (93239).

618121 is a wasteful number, since it uses less digits than its factorization.

618121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623.

The product of its digits is 96, while the sum is 19.

The square root of 618121 is about 786.2067158197. The cubic root of 618121 is about 85.1839614354.

Adding to 618121 its reverse (121816), we get a palindrome (739937).

The spelling of 618121 in words is "six hundred eighteen thousand, one hundred twenty-one".