542624521 has 2 divisors, whose sum is σ = 542624522. Its totient is φ = 542624520.

The previous prime is 542624503. The next prime is 542624557. The reversal of 542624521 is 125426245.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 329785600 + 212838921 = 18160^2 + 14589^2 .

It is a cyclic number.

It is not a de Polignac number, because 542624521 - 2¹³ = 542616329 is a prime.

It is not a weakly prime, because it can be changed into another prime (542624501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271312260 + 271312261.

It is an arithmetic number, because the mean of its divisors is an integer number (271312261).

Almost surely, 2^542624521 is an apocalyptic number.

It is an amenable number.

542624521 is a deficient number, since it is larger than the sum of its proper divisors (1).

542624521 is an equidigital number, since it uses as much as digits as its factorization.

542624521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19200, while the sum is 31.

The square root of 542624521 is about 23294.3023291104. The cubic root of 542624521 is about 815.6424212032.

The spelling of 542624521 in words is "five hundred forty-two million, six hundred twenty-four thousand, five hundred twenty-one".