540021259 has 2 divisors, whose sum is σ = 540021260. Its totient is φ = 540021258.

The previous prime is 540021241. The next prime is 540021263. The reversal of 540021259 is 952120045.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 540021259 - 2²⁹ = 3150347 is a prime.

It is not a weakly prime, because it can be changed into another prime (540021239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270010629 + 270010630.

It is an arithmetic number, because the mean of its divisors is an integer number (270010630).

Almost surely, 2^540021259 is an apocalyptic number.

540021259 is a deficient number, since it is larger than the sum of its proper divisors (1).

540021259 is an equidigital number, since it uses as much as digits as its factorization.

540021259 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 540021259 is about 23238.3574935924. The cubic root of 540021259 is about 814.3359710983.

It can be divided in two parts, 540021 and 259, that added together give a triangular number (540280 = T₁₀₃₉).

The spelling of 540021259 in words is "five hundred forty million, twenty-one thousand, two hundred fifty-nine".