542992421 has 2 divisors, whose sum is σ = 542992422. Its totient is φ = 542992420.

The previous prime is 542992381. The next prime is 542992423. The reversal of 542992421 is 124299245.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 538936225 + 4056196 = 23215^2 + 2014^2 .

It is a cyclic number.

It is not a de Polignac number, because 542992421 - 2⁶ = 542992357 is a prime.

Together with 542992423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (542992423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271496210 + 271496211.

It is an arithmetic number, because the mean of its divisors is an integer number (271496211).

Almost surely, 2^542992421 is an apocalyptic number.

It is an amenable number.

542992421 is a deficient number, since it is larger than the sum of its proper divisors (1).

542992421 is an equidigital number, since it uses as much as digits as its factorization.

542992421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 38.

The square root of 542992421 is about 23302.1977718841. The cubic root of 542992421 is about 815.8267150342.

The spelling of 542992421 in words is "five hundred forty-two million, nine hundred ninety-two thousand, four hundred twenty-one".