542043121 has 4 divisors (see below), whose sum is σ = 543337200. Its totient is φ = 540749044.

The previous prime is 542043107. The next prime is 542043163. The reversal of 542043121 is 121340245.

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 a de Polignac number, because none of the positive numbers 2^k-542043121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 542043092 and 542043101.

It is not an unprimeable number, because it can be changed into a prime (542043101) 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, 646411 + ... + 647248.

It is an arithmetic number, because the mean of its divisors is an integer number (135834300).

Almost surely, 2^542043121 is an apocalyptic number.

It is an amenable number.

542043121 is a deficient number, since it is larger than the sum of its proper divisors (1294079).

542043121 is a wasteful number, since it uses less digits than its factorization.

542043121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1294078.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 542043121 is about 23281.8195380000. The cubic root of 542043121 is about 815.3510079249.

Adding to 542043121 its reverse (121340245), we get a palindrome (663383366).

The spelling of 542043121 in words is "five hundred forty-two million, forty-three thousand, one hundred twenty-one".