556142123 has 4 divisors (see below), whose sum is σ = 556478208. Its totient is φ = 555806040.

The previous prime is 556142113. The next prime is 556142129. The reversal of 556142123 is 321241655.

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

It is a cyclic number.

It is not a de Polignac number, because 556142123 - 2⁴ = 556142107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (556142129) 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, 165548 + ... + 168873.

It is an arithmetic number, because the mean of its divisors is an integer number (139119552).

Almost surely, 2^556142123 is an apocalyptic number.

556142123 is a deficient number, since it is larger than the sum of its proper divisors (336085).

556142123 is a wasteful number, since it uses less digits than its factorization.

556142123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336084.

The product of its digits is 7200, while the sum is 29.

The square root of 556142123 is about 23582.6657314223. The cubic root of 556142123 is about 822.3599096226.

Adding to 556142123 its reverse (321241655), we get a palindrome (877383778).

The spelling of 556142123 in words is "five hundred fifty-six million, one hundred forty-two thousand, one hundred twenty-three".