542040043 has 2 divisors, whose sum is σ = 542040044. Its totient is φ = 542040042.

The previous prime is 542040017. The next prime is 542040061. The reversal of 542040043 is 340040245.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 542040043 - 2¹⁷ = 541908971 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 542039996 and 542040023.

It is not a weakly prime, because it can be changed into another prime (542043043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271020021 + 271020022.

It is an arithmetic number, because the mean of its divisors is an integer number (271020022).

Almost surely, 2^542040043 is an apocalyptic number.

542040043 is a deficient number, since it is larger than the sum of its proper divisors (1).

542040043 is an equidigital number, since it uses as much as digits as its factorization.

542040043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 542040043 is about 23281.7534348253. The cubic root of 542040043 is about 815.3494645943.

Adding to 542040043 its reverse (340040245), we get a palindrome (882080288).

The spelling of 542040043 in words is "five hundred forty-two million, forty thousand, forty-three".