540002261 has 2 divisors, whose sum is σ = 540002262. Its totient is φ = 540002260.

The previous prime is 540002251. The next prime is 540002269. The reversal of 540002261 is 162200045.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 276556900 + 263445361 = 16630^2 + 16231^2 .

It is a cyclic number.

It is not a de Polignac number, because 540002261 - 2²⁶ = 472893397 is a prime.

It is a super-2 number, since 2×540002261² = 583204883770224242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (540002269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270001130 + 270001131.

It is an arithmetic number, because the mean of its divisors is an integer number (270001131).

Almost surely, 2^540002261 is an apocalyptic number.

It is an amenable number.

540002261 is a deficient number, since it is larger than the sum of its proper divisors (1).

540002261 is an equidigital number, since it uses as much as digits as its factorization.

540002261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 540002261 is about 23237.9487261677. The cubic root of 540002261 is about 814.3264215136.

The spelling of 540002261 in words is "five hundred forty million, two thousand, two hundred sixty-one".