542262649 has 2 divisors, whose sum is σ = 542262650. Its totient is φ = 542262648.

The previous prime is 542262647. The next prime is 542262653. The reversal of 542262649 is 946262245.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 428200249 + 114062400 = 20693^2 + 10680^2 .

It is a cyclic number.

It is not a de Polignac number, because 542262649 - 2¹ = 542262647 is a prime.

Together with 542262647, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (542262647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271131324 + 271131325.

It is an arithmetic number, because the mean of its divisors is an integer number (271131325).

Almost surely, 2^542262649 is an apocalyptic number.

It is an amenable number.

542262649 is a deficient number, since it is larger than the sum of its proper divisors (1).

542262649 is an equidigital number, since it uses as much as digits as its factorization.

542262649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 40.

The square root of 542262649 is about 23286.5336407117. The cubic root of 542262649 is about 815.4610657232.

The spelling of 542262649 in words is "five hundred forty-two million, two hundred sixty-two thousand, six hundred forty-nine".