654414121 has 4 divisors (see below), whose sum is σ = 663378772. Its totient is φ = 645449472.

The previous prime is 654414113. The next prime is 654414191. The reversal of 654414121 is 121414456.

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

It can be written as a sum of positive squares in 2 ways, for example, as 553190400 + 101223721 = 23520^2 + 10061^2 .

It is a cyclic number.

It is not a de Polignac number, because 654414121 - 2³ = 654414113 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 654414121.

It is not an unprimeable number, because it can be changed into a prime (654414191) 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 3 ways as a sum of consecutive naturals, for example, 4482216 + ... + 4482361.

It is an arithmetic number, because the mean of its divisors is an integer number (165844693).

Almost surely, 2^654414121 is an apocalyptic number.

It is an amenable number.

654414121 is a deficient number, since it is larger than the sum of its proper divisors (8964651).

654414121 is an equidigital number, since it uses as much as digits as its factorization.

654414121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8964650.

The product of its digits is 3840, while the sum is 28.

The square root of 654414121 is about 25581.5191300282. The cubic root of 654414121 is about 868.1955470046.

Adding to 654414121 its reverse (121414456), we get a palindrome (775828577).

The spelling of 654414121 in words is "six hundred fifty-four million, four hundred fourteen thousand, one hundred twenty-one".