540381 has 16 divisors (see below), whose sum is σ = 760320. Its totient is φ = 341040.

The previous prime is 540377. The next prime is 540383. The reversal of 540381 is 183045.

It is not a de Polignac number, because 540381 - 2² = 540377 is a prime.

It is a super-2 number, since 2×540381² = 584023250322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7576 + ... + 7646.

It is an arithmetic number, because the mean of its divisors is an integer number (47520).

2⁵⁴⁰³⁸¹ is an apocalyptic number.

It is an amenable number.

540381 is a deficient number, since it is larger than the sum of its proper divisors (219939).

540381 is a wasteful number, since it uses less digits than its factorization.

540381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 540381 is about 735.1061147889. The cubic root of 540381 is about 81.4516757197.

The spelling of 540381 in words is "five hundred forty thousand, three hundred eighty-one".