542425421 has 2 divisors, whose sum is σ = 542425422. Its totient is φ = 542425420.

The previous prime is 542425417. The next prime is 542425441. The reversal of 542425421 is 124524245.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 289170025 + 253255396 = 17005^2 + 15914^2 .

It is a cyclic number.

It is not a de Polignac number, because 542425421 - 2² = 542425417 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (542425441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271212710 + 271212711.

It is an arithmetic number, because the mean of its divisors is an integer number (271212711).

Almost surely, 2^542425421 is an apocalyptic number.

It is an amenable number.

542425421 is a deficient number, since it is larger than the sum of its proper divisors (1).

542425421 is an equidigital number, since it uses as much as digits as its factorization.

542425421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12800, while the sum is 29.

The square root of 542425421 is about 23290.0283597938. The cubic root of 542425421 is about 815.5426503883.

Adding to 542425421 its reverse (124524245), we get a palindrome (666949666).

The spelling of 542425421 in words is "five hundred forty-two million, four hundred twenty-five thousand, four hundred twenty-one".