654121 has 8 divisors (see below), whose sum is σ = 715904. Its totient is φ = 594000.

The previous prime is 654107. The next prime is 654127. The reversal of 654121 is 121456.

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 654121 - 2⁵ = 654089 is a prime.

It is an Ulam number.

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 (654127) 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, 496 + ... + 1246.

It is an arithmetic number, because the mean of its divisors is an integer number (89488).

2⁶⁵⁴¹²¹ is an apocalyptic number.

It is an amenable number.

654121 is a deficient number, since it is larger than the sum of its proper divisors (61783).

654121 is a wasteful number, since it uses less digits than its factorization.

654121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831.

The product of its digits is 240, while the sum is 19.

The square root of 654121 is about 808.7774724855. Note that the first 3 decimals coincide. The cubic root of 654121 is about 86.8065902108.

Adding to 654121 its reverse (121456), we get a palindrome (775577).

It can be divided in two parts, 65 and 4121, that added together give a triangular number (4186 = T₉₁).

The spelling of 654121 in words is "six hundred fifty-four thousand, one hundred twenty-one".