540265261 has 4 divisors (see below), whose sum is σ = 545614524. Its totient is φ = 534916000.

The previous prime is 540265259. The next prime is 540265277. The reversal of 540265261 is 162562045.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 479347236 + 60918025 = 21894^2 + 7805^2 .

It is a cyclic number.

It is not a de Polignac number, because 540265261 - 2¹ = 540265259 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540265291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2674480 + ... + 2674681.

It is an arithmetic number, because the mean of its divisors is an integer number (136403631).

Almost surely, 2^540265261 is an apocalyptic number.

It is an amenable number.

540265261 is a deficient number, since it is larger than the sum of its proper divisors (5349263).

540265261 is a wasteful number, since it uses less digits than its factorization.

540265261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5349262.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 540265261 is about 23243.6068844747. The cubic root of 540265261 is about 814.4586018794.

The spelling of 540265261 in words is "five hundred forty million, two hundred sixty-five thousand, two hundred sixty-one".