623121 has 8 divisors (see below), whose sum is σ = 846720. Its totient is φ = 407472.

The previous prime is 623107. The next prime is 623171. The reversal of 623121 is 121326.

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

It is not a de Polignac number, because 623121 - 2⁶ = 623057 is a prime.

It is an Ulam number.

It is a Curzon number.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 623121.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 623121.

It is not an unprimeable number, because it can be changed into a prime (623171) 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, 1801 + ... + 2118.

It is an arithmetic number, because the mean of its divisors is an integer number (105840).

2⁶²³¹²¹ is an apocalyptic number.

It is an amenable number.

623121 is a deficient number, since it is larger than the sum of its proper divisors (223599).

623121 is a wasteful number, since it uses less digits than its factorization.

623121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3975.

The product of its digits is 72, while the sum is 15.

The square root of 623121 is about 789.3801365629. The cubic root of 623121 is about 85.4130301314.

Adding to 623121 its reverse (121326), we get a palindrome (744447).

The spelling of 623121 in words is "six hundred twenty-three thousand, one hundred twenty-one".