553405121 has 4 divisors (see below), whose sum is σ = 553964544. Its totient is φ = 552845700.

The previous prime is 553405091. The next prime is 553405123. The reversal of 553405121 is 121504355.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 553405121 - 2²⁶ = 486296257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (553405123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278225 + ... + 280206.

It is an arithmetic number, because the mean of its divisors is an integer number (138491136).

Almost surely, 2^553405121 is an apocalyptic number.

It is an amenable number.

553405121 is a deficient number, since it is larger than the sum of its proper divisors (559423).

553405121 is an equidigital number, since it uses as much as digits as its factorization.

553405121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559422.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 553405121 is about 23524.5642042525. The cubic root of 553405121 is about 821.0086343988.

Adding to 553405121 its reverse (121504355), we get a palindrome (674909476).

The spelling of 553405121 in words is "five hundred fifty-three million, four hundred five thousand, one hundred twenty-one".