555042021 has 8 divisors (see below), whose sum is σ = 742153920. Its totient is φ = 368979072.

The previous prime is 555042017. The next prime is 555042029. The reversal of 555042021 is 120240555.

It is a happy number.

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

It is not a de Polignac number, because 555042021 - 2² = 555042017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 555041982 and 555042000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (555042029) 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, 261001 + ... + 263118.

It is an arithmetic number, because the mean of its divisors is an integer number (92769240).

Almost surely, 2^555042021 is an apocalyptic number.

It is an amenable number.

555042021 is a deficient number, since it is larger than the sum of its proper divisors (187111899).

555042021 is a wasteful number, since it uses less digits than its factorization.

555042021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524475.

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 555042021 is about 23559.3298079551. The cubic root of 555042021 is about 821.8173163330.

Adding to 555042021 its reverse (120240555), we get a palindrome (675282576).

The spelling of 555042021 in words is "five hundred fifty-five million, forty-two thousand, twenty-one".