556065421 has 4 divisors (see below), whose sum is σ = 556123644. Its totient is φ = 556007200.

The previous prime is 556065403. The next prime is 556065439. The reversal of 556065421 is 124560655.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (556065403) and next prime (556065439).

It can be written as a sum of positive squares in 2 ways, for example, as 399440196 + 156625225 = 19986^2 + 12515^2 .

It is a cyclic number.

It is not a de Polignac number, because 556065421 - 2⁹ = 556064909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556065491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11050 + ... + 35131.

It is an arithmetic number, because the mean of its divisors is an integer number (139030911).

Almost surely, 2^556065421 is an apocalyptic number.

It is an amenable number.

556065421 is a deficient number, since it is larger than the sum of its proper divisors (58223).

556065421 is a wasteful number, since it uses less digits than its factorization.

556065421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58222.

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 556065421 is about 23581.0394384980. The cubic root of 556065421 is about 822.3221018110.

The spelling of 556065421 in words is "five hundred fifty-six million, sixty-five thousand, four hundred twenty-one".