540426521 has 2 divisors, whose sum is σ = 540426522. Its totient is φ = 540426520.

The previous prime is 540426517. The next prime is 540426533. The reversal of 540426521 is 125624045.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 389628121 + 150798400 = 19739^2 + 12280^2 .

It is a cyclic number.

It is not a de Polignac number, because 540426521 - 2² = 540426517 is a prime.

It is a super-3 number, since 3×540426521³ (a number of 27 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (540426541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270213260 + 270213261.

It is an arithmetic number, because the mean of its divisors is an integer number (270213261).

Almost surely, 2^540426521 is an apocalyptic number.

It is an amenable number.

540426521 is a deficient number, since it is larger than the sum of its proper divisors (1).

540426521 is an equidigital number, since it uses as much as digits as its factorization.

540426521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 540426521 is about 23247.0755365057. The cubic root of 540426521 is about 814.5396278360.

The spelling of 540426521 in words is "five hundred forty million, four hundred twenty-six thousand, five hundred twenty-one".