616121 has 8 divisors (see below), whose sum is σ = 681600. Its totient is φ = 552240.

The previous prime is 616117. The next prime is 616129. The reversal of 616121 is 121616.

It is a happy number.

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 616121 - 2² = 616117 is a prime.

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

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 616121.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 616121.

It is not an unprimeable number, because it can be changed into a prime (616129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 515 + ... + 1223.

It is an arithmetic number, because the mean of its divisors is an integer number (85200).

2⁶¹⁶¹²¹ is an apocalyptic number.

It is an amenable number.

616121 is a deficient number, since it is larger than the sum of its proper divisors (65479).

616121 is a wasteful number, since it uses less digits than its factorization.

616121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799.

The product of its digits is 72, while the sum is 17.

The square root of 616121 is about 784.9337551666. The cubic root of 616121 is about 85.0919880720.

Adding to 616121 its reverse (121616), we get a palindrome (737737).

It can be divided in two parts, 616 and 121, that added together give a palindrome (737).

The spelling of 616121 in words is "six hundred sixteen thousand, one hundred twenty-one".