540247 has 8 divisors (see below), whose sum is σ = 572544. Its totient is φ = 508728.

The previous prime is 540233. The next prime is 540251. The reversal of 540247 is 742045.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 540247 - 2⁷ = 540119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1768 + ... + 2050.

It is an arithmetic number, because the mean of its divisors is an integer number (71568).

2⁵⁴⁰²⁴⁷ is an apocalyptic number.

540247 is a deficient number, since it is larger than the sum of its proper divisors (32297).

540247 is a wasteful number, since it uses less digits than its factorization.

540247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389.

The product of its (nonzero) digits is 1120, while the sum is 22.

The square root of 540247 is about 735.0149658340. The cubic root of 540247 is about 81.4449425525. Note that the first 3 decimals are identical.

Subtracting from 540247 its sum of digits (22), we obtain a square (540225 = 735²).

It can be divided in two parts, 540 and 247, that added together give a palindrome (787).

The spelling of 540247 in words is "five hundred forty thousand, two hundred forty-seven".