542026421 has 2 divisors, whose sum is σ = 542026422. Its totient is φ = 542026420.

The previous prime is 542026409. The next prime is 542026439. The reversal of 542026421 is 124620245.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 356794321 + 185232100 = 18889^2 + 13610^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-542026421 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (542026321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271013210 + 271013211.

It is an arithmetic number, because the mean of its divisors is an integer number (271013211).

Almost surely, 2^542026421 is an apocalyptic number.

It is an amenable number.

542026421 is a deficient number, since it is larger than the sum of its proper divisors (1).

542026421 is an equidigital number, since it uses as much as digits as its factorization.

542026421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 542026421 is about 23281.4608862932. The cubic root of 542026421 is about 815.3426343588.

Adding to 542026421 its reverse (124620245), we get a palindrome (666646666).

The spelling of 542026421 in words is "five hundred forty-two million, twenty-six thousand, four hundred twenty-one".