542612381 has 2 divisors, whose sum is σ = 542612382. Its totient is φ = 542612380.

The previous prime is 542612377. The next prime is 542612407. The reversal of 542612381 is 183216245.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 445589881 + 97022500 = 21109^2 + 9850^2 .

It is a cyclic number.

It is not a de Polignac number, because 542612381 - 2² = 542612377 is a prime.

It is a super-2 number, since 2×542612381² = 588856392028978322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (542612311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271306190 + 271306191.

It is an arithmetic number, because the mean of its divisors is an integer number (271306191).

Almost surely, 2^542612381 is an apocalyptic number.

It is an amenable number.

542612381 is a deficient number, since it is larger than the sum of its proper divisors (1).

542612381 is an equidigital number, since it uses as much as digits as its factorization.

542612381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 32.

The square root of 542612381 is about 23294.0417489108. The cubic root of 542612381 is about 815.6363384379.

The spelling of 542612381 in words is "five hundred forty-two million, six hundred twelve thousand, three hundred eighty-one".