542121 has 8 divisors (see below), whose sum is σ = 728064. Its totient is φ = 358800.

The previous prime is 542119. The next prime is 542123. The reversal of 542121 is 121245.

It is an interprime number because it is at equal distance from previous prime (542119) and next prime (542123).

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

It is not a de Polignac number, because 542121 - 2¹ = 542119 is a prime.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 542121.

It is not an unprimeable number, because it can be changed into a prime (542123) 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, 105 + ... + 1046.

It is an arithmetic number, because the mean of its divisors is an integer number (91008).

2⁵⁴²¹²¹ is an apocalyptic number.

It is an amenable number.

542121 is a deficient number, since it is larger than the sum of its proper divisors (185943).

542121 is a wasteful number, since it uses less digits than its factorization.

542121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1311.

The product of its digits is 80, while the sum is 15.

The square root of 542121 is about 736.2886662173. The cubic root of 542121 is about 81.5390055052.

Adding to 542121 its reverse (121245), we get a palindrome (663366).

The spelling of 542121 in words is "five hundred forty-two thousand, one hundred twenty-one".