541981 has 8 divisors (see below), whose sum is σ = 612000. Its totient is φ = 475440.

The previous prime is 541967. The next prime is 541987. The reversal of 541981 is 189145.

It is a happy number.

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 541981 - 2⁹ = 541469 is a prime.

It is a super-2 number, since 2×541981² = 587486808722, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (541987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 531 + ... + 1168.

It is an arithmetic number, because the mean of its divisors is an integer number (76500).

2⁵⁴¹⁹⁸¹ is an apocalyptic number.

It is an amenable number.

541981 is a deficient number, since it is larger than the sum of its proper divisors (70019).

541981 is a wasteful number, since it uses less digits than its factorization.

541981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1739.

The product of its digits is 1440, while the sum is 28.

The square root of 541981 is about 736.1935886708. The cubic root of 541981 is about 81.5319858893.

Subtracting from 541981 its reverse (189145), we obtain a square (352836 = 594²).

The spelling of 541981 in words is "five hundred forty-one thousand, nine hundred eighty-one".